00320nam a2200109Ia 4500082002600000100001800026245010000044260004600144300001000190500000500200700000500205  a338.10954914bG684.TC  aGotsch, C. H.  aTechnological change and private investment in agricultureba case study of the Pakistan Punjab  aCambridgebHarvard University Pressc1966  a151p.  a  a