TY  - GEN
AU  - David J. Connor, Robert S. Loomis
AU  - Kenneth G. Cassman
TI  - Crop Ecology: Productivity and Management in Agricultural System 
SN  - 9780521744034
U1  - 630.277 22
PY  - 2011///
CY  - New York
PB  - Cambridge University Press
KW  - Ecology
N1  - Agriculture
ER  -