004170000a22001330004500060000800000082001200008100001900020100001400039245011100053260002700164260000900191300000800200650007500208  a100  a631 HAY  aMIchael,   A M  aOjha, T P  aPrinciples of agricultural Engineering Vol 1: Farm power farm machinery farm electricity and farm building  aJodhpur, Jain brothers  c1966  a451  aAgricultural engineering / farm power / farm machinery / farm building