00459nam a2200157Ia 4500008004100000082001600041100001800057245003600075260004100111300000800152650004100160650003400201653002900235700001800264700001900282170901s1961    xx            000 0 und d  a631.3bR47A  aRichey, C. B. 0aAgricultural Engineers Handbook  aNew YorkbMcGraw-Hill Book Co.c1961  a880  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgricultural engineering  aHall, Carl W.  aJacobson, Paul