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Z.H.Osman, and E. L. A. Morshedy, "Digital Computation of Switching Transients in Three Phase Radial Systems", Proc. Of Middle East Power System Conference Mepcon'89, Egypt, Jan 1989.
Nigm, A. A., "Dairy performance of some exotic breeds at Tahreer province [Egypt]", Veterinary Medical Journal, Cairo Univ., vol. 38, 1990. Abstract
Nigm, A. A., "Dairy performance of some exotic breeds at Tahreer province.", Veterinary Medical Journal Giza, vol. 38, issue 3, pp. 351-361, 1990. Abstract
Alkin, M. C., Debates on {Evaluation}, , London, Sage, 1990. Abstract
Karim, I. A., A. El-Sanousi, N. M. A. Yousef, and I. M. Reda, "Detection of coronavirus antigen in fecal samples obtained from newborn buffalo calves", Veterinary Medical Journal (Egypt), 1990. Abstract
Casini, M., M. A. Harith, V. Palleschi, A. Salvetti, D. P. Singh, and M. Vaselli, "Detection of pollutants in air by time-resolved LIBS System", Europhysics Conference Abstracts B, vol. 14, pp. 292, 1990. Abstract
Abo El-Zahab, A., M. Abdalla, A. Nassib, and M. Koronfel, "Differential response of a diverse array of faba bean (Vicia faba L.) breeding stocks to particular moisture regimes: I- Mean performance", Proceeding of the 4th Conference of Agronomy. , Cairo-Egypt, vol. 1, pp. 447–463, 1990. Abstract
Abo El-Zahab, A., A. Nassib, and M. Koronfel, "Differential response of a diverse array of faba bean (Vicia faba L.) breeding stocks to particular moisture regimes: II- Nature of variability", Proceeding of the 4th Conference of Agronomy. , Cairo-Egypt, vol. 1, pp. 465–482, 1990. Abstract
ABO EL-ZAHAB, A.A., A. B. D. A. L. L. A. N. A. S. S. I. B. M. M. F. A. M., and M. A. KORONFEL, "Differential response of a diverse array of faba bean Vicia faba L.", Breeding stocks to particular moisture regimes. I. Mean performance. Proc. 4th Conf. Agron. Cairo, 15-16 Sept. 1990,, pp. 447–463, 1990. Abstract
Ayoub, M. I., and K. A. Mansour, "A difficulty of biometry in myopes.", Bull. Ophthalmol. Soc. Egypt, vol. 83, pp. 381-383, 1990.
Teo, L. - H., A. M. Hammond, J. P. Woodring, and H. W. Fescemyer, "Digestive enzymes of the velvetbean caterpillar (Lepidoptera: Noctuidae)", Annals of the Entomological Society of America, vol. 83, issue 4: Oxford University Press Oxford, UK, pp. 820-826, 1990. Abstract
S.Youssef, S., E. H. A. Hussein, E. - A. S.E.D., and S. A.R., "Distribution of heterochromatin in Hordeum vulgare chromosomes as revealed by N-banding technique..", Assiut Journal of Agric. Sci., vol. 21, issue 5, pp. 81-92, 1990. Abstract
Ohtsuka, N., M. E. Shabshiry, M. Ismail, A. Faessler, and J. Aichelin, "Does photon production in heavy-ion collisions depend on the equation of state?", Journal of Physics G: Nuclear and Particle Physics, vol. 16, no. 8, pp. L155-L161, 1990. AbstractWebsite

Photon production cross sections in 12C-12C and 40Ca-40Ca collisions at Elab=84 and 200 MeV/A are calculated in the framework of the quantum molecular dynamics approach using the medium-dependent NN cross section obtained from the G matrix. Photons are assumed to be produced by incoherent pn bremsstrahlung and a simple classical expression for the production cross section is used. The effects of the equation of state for nuclear matter on the photon production cross section are studied in detail. In the 12C-12C collision, the authors found little difference in the photon cross section due to differences in the equation of state both at 84 and 200 MeV/A. In the 40Ca-40Ca collision, slightly more high-energy photons are produced in the case of the soft equation of state and the difference is slightly larger at higher incident energies.

Abu Khadrah, A. M., E. A. A. Youssef, and A. A. Refaat, "Depositional environments and diagensis of the Matulla Formation, Abu Zenima area, ‎West-Central Sinai, Egypt.", Bull. Fac. Sci. Cairo Univ., vol. v. 58, pp. 493-513, 1990.
Sayyouh, M. H., A. AbdelWally, J. George, and A. Osman, "Design of a micro-emulsion slug for maximizing tertiary oil recovery efficiency", SPE 20804 of AIME , pp. USA, 1990.
El-Said, M., and A. A. Nazir, "Detection of Inhomogenities In a Half Space By The Potential on The Surface Using the Finite Element Method", Proc. of the URSI Seventh National Radio Science Conference: B1, pp. 1-10, 1990.
Ezz El -Dien, N. M., M. S. Abd El-Rahman, H. M. A. El-Gawady, E. A. E. Imam, and M. M. Fahmy, "Detection of tow new trematodes species from marine fishes in Egypt. ", J. Egypt. Vet. Med. Ass., vol. 50 , issue 4, pp. 507-517., 1990.
Helmi, F. M., "Deterioration and conservation of some mudbrick in Egypt", 6th International conference on the conservation of earthen architecture, Adobe 90, Las Cruces, New Mexico, USA, 1990.
EL-Samee, A. E. - M. A. A., Diagnostic aids by using renal function tests in camels in health and disease., , Giza, Cairo University, 1990.
El-Tantawy, H., A. K. Hegazy, G. M. Fahmy, and A. E. Hashem, "Drying-out curves, survival and pigment content of two Mediterranean halophytes growing naturally along salinity gradien", Egyptian Journal of Applied Science, vol. 5, pp. 192-207, 1990.
El-Hadidi, M. T., M. S. A, and M. S. Metwally, "Design of an E-Mail System for Personal Computers", Engineering Journal of Qatar University, vol. 4, pp. 51-69, 1991.
Osman, T. A., Z. S. Safar, and M. O. A. Mokhtar, "Design of annular recess hydrostatic thrust bearing under dynamic loading", Tribology international, vol. 24, no. 3: Elsevier, pp. 137–141, 1991. Abstract
Safar, Z. S., and T. A. Osman, "Design of Hydrodynamic Wavy Contacting Face Seals with Non-Newtonian Lubricants", Vehicle Tribology: Proceedings of the 17th Leeds-Lyon Symposium on Tribology Held at the Institute of Tribology, Leeds University, Leeds, UK, 4th-7th September 1990: Elsevier Science & Technology, pp. 259, 1991. Abstract