TY  - BOOK
AU  - Lange,W  .
AU  - Zeven,A C  .
AU  - Hogenboom,N G  .
TI  - Efficiency in plant breeding / 
SN  - 8170891256
U1  - 631.52 
PY  - 1990///
CY  - Dehra Dun : 
PB  - International Book Distributors , 
KW  - PLANT BREEDING
N1  - Includes index
ER  -