TY  - BOOK
AU  - Spedding,C.R.W.
AU  - Walsingham,J.M.
AU  - Hoxey,A.M.
TI  - Biological efficiency in agriculture
SN  - 0126565600
PY  - 1981///
CY  - London
PB  - Academic Press
KW  - Field crops
KW  - Physiology
ER  -