000			00329nam a2200133Ia 4500
008			130225s9999 xx 000 0 und d
100			_aKnox, C.W.
245			_aFaactors influencing egg production
260			_aIowa _c1932
300			_a248-260 p.
440			_aIowa Agricultural Experiment
901			_a21989
942			_cB _2udc
999			_c3774 _d3774