00299nam a2200109Ia 4500082002000000100003700020245003900057260004300096300001500139500000500154700003000159  a338.16bL434.BC  aLeagans, J. P. and Loonis, C. P.  aBehavioral change in agricultureb  aIthacabCornell University Pressc1971  axii, 506p.  a  aLoonis, C. P. ; jt. auth.