00671nam a22002177a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001600102100001800118245010800136260007500244300001100319490003400330650002800364650002700392830003400419CHAP20220329140049.0971013s1953    us      r     00010 eng d  a46421  a47393  a51535  cCHAP00a631.522bT400aThomas, Mary.1 aBack crossing; the theory and practice of the backeross method in the breeding of some non-cereal crops  aCambridge :bCommonwealth Bureau of Plant Breeding and Genetics,c1953  a136 p.  aTechnical communicationv; 1614aCultivosxMejoramiento.14aPlantasxMejoramiento.0 aTechnical communicationv; 16