00808nam a2200229ua 4500003001000000005001700010008004100027020001800068040003000086100002000116245006800136260009200204500006400296504004800360650001700408650001300425650002100438650002500459655001000484710004000494710004400534AR-SsjUCA20250716140443.0250228s1984    xxu           000 0 eng d  a0-89118-517-8  aAR-SsjUCAbspacAR-SsjUCA1 aFehr, Walter R.10aGenetic contributions to yield gains of five major crop plants.  aMadison, WI :bCrop Science Society of America :bAmerican Society of Agronomy,cc1984.  aProceedings of a symposium..2 Dec. 1981,in Atlanta,Georgia.  aBibliografía al final de cada capítulo. 4aConferencias 4aCultivos 4aFitomejoramiento 4aProducción vegetal 4aTexto2 aAmerican Society of Agronomy. ASA. 2 aCrop Science Society of America. CSSA.