TY  - BOOK
AU  - Loomis,S.R.
TI  - Crop Ecology:Productivity and Management in Agricultural Systems
SN  - 0-521-38776-0
AV  - 631/LOO 1
U1  - 631/LOO 
PY  - 1992///
CY  - New York
PB  - Cambridge University
ER  -