TY  - BOOK
AU  - Hay, Robert K. M.
AU  - Walker, Andrew J
TI  - An introduction to the physiology of crop yield
SN  - 0582408083
AV  - SB112.5.H3 1989 
PY  - 1989///
CY  - Harlow, Essex, England
PB  - Longman Scientific & Technical
KW  - Crops
KW  - Physiology
KW  - Crop yields
ER  -