00361nam a2200109   450000100070000000500170000700800360002410000460006024500900010625000110019626400440020700778820260807101510.0260101s1971    pe      000 0 eng  d1 aed. J. Paul Leagans and Charles P. loomis10aBehavioral Change in Agriculture : concepts and strategies for influencing transition  a1a ed. 1aLondresbCornell University Pressc1971