00454 a2200145 4500020001500000082001700015100001800032245005700050260003800107300001800145650003100163650006000194650003300254700002100287 a8185031347 a631.523bKUM aKumar, J. C.  aTechniques of developing hybrids in vegetable crops  aBiknerbAgro Botanicac1990g1990 avi,72p.c23cm acultivation and harvesting aproduction of propagational organisms and new varieties aDevelopment of new varieties aDhaliwal, M. S.