00354nam a2200133Ia 4500008004100000082001800041100001700059245003300076260000900109300000800118650004100126650003400167653001900201170901s1960    xx            000 0 und d  a631.522bA37P  aAllard, R.W. 0aPrinciples of Plant Breeding  c1960  a485  aAgriculture and related technologies  aTechnology (Applied sciences)  aPlant breeding