TY  - BOOK
AU  - ed. by Pearson, C.J.
TI  - Field crop ecosystems /ed. by C.J. Pearson
T2  - Ecosystems of the World
SN  - 0444886753
U1  - 574.5264 
PY  - 1992///
CY  - Amsterdam
PB  - Elsevier
ER  -