00284nam a2200097Ia 4500008004100000082002500041100002400066245005000090260003800140300000800178140113s9999    xx            000 0 und d  a631.52:633.174.2  L6  a"Jugenheimer, P.W."  a"Corn : Imparovement, seed production & uses"  a1976bJohn Wiley & SonscNew York  a670