00541cam a22002177a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001600102100002800118245003600146260003400182300002000216504003200236650001900268650001200287650002400299CHAP20220329133923.0971013s1963 r 00010 d a12692 a13664 a17736 cCHAP a633.15bH3900aHayes, Herbert Kendall.12aA professor's story hybrid corn aMinneapolis :bBurgess,c1963 a237 p.b: ilus. aBibliografía : p. 220-23314aHibridación.14aMaíz.14aMaízxVariedades.