000			00311 a2200133 4500
080			_a63 _bI 64 C
245	1		_a70's Challenge and opportunity
260			_aIowa _bState University Press _c1970
650			_aAgriculture
700			_aIowa, State University
100			_a _d
300			_a91 p.
901			_a109742
999			_c40670 _d40670