TY  - BOOK
AU  - Simmonds N.W.
TI  - Principles of Crop Improvement
SN  - 058407028
AV  - SB106.I47 SIM
PY  - 1979///
CY  - Essex
PB  - Longman
KW  - Crop movement
KW  - Evolution of crops
KW  - Genetic aspects of crops
N1  - Includes bibliographical references and index
ER  -