00494nam a2200181Ia 4500008004100000020001500041082001600056100001600072245003300088250000600121260004300127300000800170650004100178650003400219653002700253700001600280700001600296170901s1982    xx            000 0 und d  a087055252X  a631.3bK47P  aKepner, R.A 0aPrinciples of Farm Machinery  a3  aWestportbAVI Publishing Co. Incc1982  a528  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgricultural machinery  aBainer, Roy  aBarger, E.L