TY  - BOOK
AU  - De Walle, F.B.
TI  - Agriculture and the environment: mineral, manure and measures
U1  - ECON 630.1745 D36A 
PY  - 1998///
CY  - Dordrecht
PB  - Kluwer Academic
KW  - AGRICULTURAL ECOLOGY - ENVIRONMENTAL ASPECTS
KW  - AGRICULTURAL ECOLOGY - ENVIRONMENTAL ASPEC
KW  - FERTILIZERS AND MANURES
ER  -