TY  - BOOK
AU  - N. W. Simmonds
TI  - Principles of crop improvement
SN  - 0-582-40737-0
U1  - 581.56 
PY  - 1986///
CY  - England
PB  - English Language Book Society
KW  - Breeding
N1  - N. W. Simmonds: Principles of crop improvement.  England.  English Language Book Society, 1986. 0-582-40737-0--(581.56SIM)
ER  -