003450000a22001210004500060000800000082001400008100002300022245005900045260004500104260000900149300000800158650005700166  a100  a631.7 ROE  aRoe, Harry Burgess  aMoisture requirements in agriculture : farm irrigation  aNew York, Mc Graw- Hill Book Company Inc  c1950  a401  aFarm irrigation/ irrigation - administrative aspects