@book {8498,
	title = {The annual species of Medicago. Magnes Press, The Hebrew University},
	year = {1963},
	month = {1963///},
	publisher = {Jerusalem},
	organization = {Jerusalem},
	author = {C.C. Heyn}
}
@book {8499,
	title = {Biosystematic approaches to the solution of taxonomic problems in Israel},
	year = {1971},
	month = {1971///},
	pages = {181 - 193},
	author = {C.C. Heyn}
}
