@book{75027,
	author = {Gustafson, A. F.},
	title = {Conservation of the soil,},
	publisher = {McGraw-Hill,},
	year = {1937.},
	series = {McGraw-Hill publications in the agricultural and botanical sciences, E. W. Sinnott, consulting editor},
	address = {New York and London,},
	edition = {1st ed.}
}