003510000a22001450004500020001500000060000800015082001600023100002000039245005700059250000600116260002700122260000900149300000800158650003900166  a0582460379  a100  a630.913 WRI  aWrigley, Gordon  aTropical agriculture : the development of production  a4  aUK, Longman groups Ltd  c1981  a496  atropical agriculture/ crop ecology