TY  - BOOK
AU  - Simmonds,N.W.
TI  - Principles of crop improvement
SN  - 0582446309
U1  - 631.53 22
PY  - 1979///
CY  - London
PB  - Longman
KW  - Plant-breeding
N1  - Includes indexes; Bibliography: p. 369-399; Reference text : *AG401/ *AGP31 (Agriculture)
ER  -