@article {17915,
	title = {ffect of potassium levels and some microelements on potato yield  and quality},
	journal = {Annals of Agric. Sc., Moshtohor},
	volume = {2},
	year = {1990},
	pages = {1255-1266.},
	author = {Shehata, S. A.;  and and E. A. Abou EL-Hassan and EL-Sayed,S. F.}
}
