00501nam a2200169Ia 4500008004100000020001500041082001600056100002200072245007300094250000600167260002700173300000800200650004100208650003400249653002900283700001900312170901s1991    xx            000 0 und d  a0412069911  a631.3bR90I  aRoth, Lawrence O. 0aIntroduction to Agricultural EngineeringbA problem solving approach  a2  aLondonbSpringerc1991  a347  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgricultural engineering  aField Harry L.