00280nam a2200097Ia 4500008004100000082002100041100003900062245003600101260003700137300000800174140113s9999    xx            000 0 und d  a631:62(024)   K1  a"Richey, C.B. & Jacobson, P., Ed."  aAgricultural Engineers handbook  a1961bMcGraw Hill BookcNew York  a880