Studies on immune response of pregnant ewes to different E.coli K99 vaccines.

Citation:
Kamel, M.M., Balata, M.A., El-Naggar, A., Ibrahim, Metias, K.N., M. Refai, and M. A. Abd El Aziz, "Studies on immune response of pregnant ewes to different E.coli K99 vaccines. ", Proc. 5th Sci. Vet.Med.Conf. Zagazig Univ , vol. 1, pp. 26-31, 2000.
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