TY  - BOOK
AU  - Simmonds,N.W.
TI  - Principles of crop improvement
SN  - 0582407370 (paperback)
AV  - SB106.I47 S56 
PY  - 1981///
CY  - Singapore
PB  - Longman
KW  - Crop improvement
N1  - Includes bibliographical references and index
ER  -