@book{31051,
	author = {Lockhart, J. A. R. and Wiseman, A. J. L.},
	title = {Introduction to crop husbandry},
	publisher = {Pergamon Press,},
	year = {1970},
	series = {The Commonwealth and International Library of Science, Technology, Engineering and Libreral Studies},
	address = {Oxford :},
	edition = {2 ed.}
}