@book{56107,
	author = {Zapata Tosca, Víctor Manuel.},
	title = {Forage yield and protein content of lowcrown and erect types of alfalfa under frequent clipping treatment},
	publisher = {The author,},
	year = {1949},
	address = {Ames :},
	note = {Thesis (Master of Science) -- Iowa State College}
}