00863nam0-22003131i-450-99000145905040332120001010000145905FED01000145905(Aleph)000145905FED0100014590520000920d1959----km-y0itay50------baengUSa---a---001yySoil conservationHelmut Kohnke, Anson R. BertrandNew YorkMcGraw Hill1959vii, 298 p.ill.25 cmMcGraw-Hill Publications in the agricultural sciencesPedologiaKohnke,Helmut64103Bertrand,Anson RabbITUNINARICAUNIMARCBK9900014590504033219 III 1510472DBVDBVSoil conservation379428UNINA