00843cam a2200229   45000010008000000030008000080050017000160080041000330150015000740350023000890350017001120400036001290820016001651000018001812450129001992600076003283000025004043650014004294900099004435040051005426500020005933099064BD-DhUL20150109175854.0740206s1952    xx            000 0 eng d  aGB52-11761  a(OCoLC)ocm00791718  a(NNC)3099064  aMIAcBD-DhULdUKMdZCUdBD-DhUL04a631.5232181 aThomas, Mary.10aBack crossing :bthe theory and practice of the backcross method in the breeding of some non-cereal crops /cby Mary Thomas.  aCambridge :bCommonwealth Bureau of Plant Breeding and Genetics,c1952.  avi, 136 p. :c22 cm.  aRSb13.101 aCommonwealth Bureau of Plant Breeding and Genetics, Cambridge, Eng. Technical communication 16  aIncludes bibliographical references and index. 0aPlant breeding.