TY  - BOOK
AU  - SIMMONDS, N W
TI  - Principles of crop improvement
U1  - 575:631.52 
PY  - 1979///
CY  - London
PB  - Longman
KW  - Crop improvement
KW  - Genetic conservation
KW  - In vitro methods
KW  - Induced mutation
KW  - Plant breeding
KW  - Polyploidy
ER  -