@book{28887,
	author = {Kipps, Michael Smith, and Wolfe, Thomas Kennerly,},
	title = {Production of field crops :},
	publisher = {McGraw-Hill ;},
	year = {c1970},
	series = {McGraw-Hill publications in the agricultural sciences},
	address = {New York :},
	note = {Fifth ed. by T. K. Wolfe and M. S. Kipps.}
}