00314nam a2200133Ia 45000030006000000080041000060400015000471000016000622450054000782500010001322600009001425460012001510050017001630STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKipps, M.S.  aProduction of field crops: A textbook of agronomy  aSixth  c1970  aEnglish20220125170343.0