@book{12496,
	author = {Shippen J. M. and Ellin, C. R.},
	title = {Basic farm machinery /},
	publisher = {Pergamon Press,},
	year = {1980.},
	series = {Pergamon international library of science, technology, engineering, and social studies},
	address = {Oxford ;},
	edition = {3rd ed.},
	note = {Includes index.}
}