TY  - BOOK
AU  - Simmonds, N. W.
TI  - Principles of crop improvement
SN  - 0582407370
U1  - 631SIM 22nd
PY  - 1979///
CY  - Essex, England
PB  - Longman group limited
KW  - Agriculture
KW  - Crop improvement
N1  - includes index and bibliography
ER  -