TY  - BOOK
AU  - Simmonds, N.W.
TI  - Principles of Crop Improvement
SN  - 0582407028
U1  - 631.53 
PY  - 1979///
CY  - UK
PB  - English Language Book Society
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Plant breeding
ER  -