00458nam a2200157Ia 4500008004100000082001300041100001700054245003300071250001200104260003900116300001300155600004400168600003000212600003100242650002700273140224s9999    xx            000 0 und d  a631.3 L8  aKepner, R.A.  aPrinciples of farm machinery  a3rd ed.  aWestportbConnecticut, AVIcc 1978  axi,527p.  a R.A.Kepner, Roy Bainer and E.L.Barger.  aBainer, Roy, joint author  aBarger, E.L., joint author  aAgricultural machinery