00315nam a2200121Ia 45000030006000000080041000060400015000471000036000622450057000982600009001555460012001640050017001760STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aRoger Hexem, W.; Earl Heady, O.  aWater production functions for irrigated agriculture  c1978  aEnglish20220125165553.0