@book{24590,
	author = {Kral, David M,},
	title = {Predicting Tillage Effects on Soil Physical Properties and Processes /},
	publisher = {Soil Science Society of America,},
	year = {1982.},
	series = {SSSA Special Publications Number 44},
	address = {Madison, Wisconsin :},
	note = {Incluye Bibliografía.}
}