00305nam a2200121Ia 45000030006000000080041000060400015000471000038000622450045001002600009001455460012001540050017001660STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aProffesional agricultural workers  aManual of conservation of soil and water  c1984  aEnglish20220125170349.0