TY  - BOOK
AU  - Spedding, C. R. W. and others,
TI  - Biological Efficiency in Agriculture
SN  - 0126565600
U1  - 630 
PY  - 1981///
CY  - New York
PB  - Academic Press
KW  - Agriculture. & related technologies
KW  - Field Crops Physiology
ER  -