TY  - GEN
AU  - Hay, Robert K. M.
AU  - Walker, Andrew J.
TI  - An introduction to the physiology of crop yield
SN  - 0-470-21192-x
U1  - 631.52 
PY  - 1989///
CY  - Harlow
PB  - Longman Scientific & Technical
KW  - PHYSIOLOGY CROP YIELD CASE HISTORIES
ER  -