000			00357nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aJensen, Einar and Others
245			_aInput-output relationships in milk production
260			_aWashington _c1942
300			_a1-88 p.
440			_aUnited States Department of A
901			_a13223
942			_cB _2udc
999			_c1805 _d1805