TY  - GEN
AU  - Simmonds, N. W.
TI  - Principles of crop improvement
SN  - 0582446309
U1  - 631.53  
PY  - 1979///
CY  - Harlow : 
PB  - Longman Scientific and Technical
KW  - Plant
KW  - Breeding
KW  - Agriculture
KW  - Crop improvement
N1  - Includes bibliographical references and index
ER  -