00347nam a2200121Ia 4500008004100000082001800041100002000059245003800079250000900117260002900126300000600155650006400161150614s9999    xx            000 0 und d  a338.16  LEA-B  aLeagans Paul J.  aBehavioural Change in Agriculture  aI ED  bCornell Uty. Pressc1971  a0  aBehavioural Change in Agriculture Leagans Paul J.,Economics