00394nam a2200133Ia 4500008004100000082001600041100001900057245002900076260005000105300000800155650004100163650003400204653002200238170901s1948    xx            000 0 und d  a631.4bG96U  aGustafson, A.F 0aUsing and Managing Soils  aNew YarkbMcGraw-Hill Book Company, Incc1948  a420  aAgriculture and related technologies  aTechnology (Applied sciences)  aSoil conservation