共 12 条
[4]
Chowdhury ME, 1996, J AGR RESOUR ECON, V21, P82
[8]
An economic analysis of groundwater contamination from agricultural nitrate emissions in southern Ontario
[J].
CANADIAN JOURNAL OF AGRICULTURAL ECONOMICS-REVUE CANADIENNE D ECONOMIE RURALE,
1995, 43 (03)
:387-402