TY  - BOOK
AU  - Carlson, Peter S., ed.
TI  - The biology of crop productivity
SN  - 0121598500
U1  - 631.558 21st ed.
PY  - 1980///
CY  - New York
PB  - Academic Press
KW  - Crop science
N1  - Index: p. 461-71
ER  -