TY  - BOOK
AU  - JASPAL Singh
TI  - Combining ability analysis in relation to plant density in Indian mustard (Brassica juncea (L) coss.)
U1  - T 633.84 J35C 
PY  - 1989///
CY  - Ludhiana
PB  - PAU
KW  - MUSTARD -- VARIETIES -- BREEDING
ER  -