Competition for wetlands in the Midwest : an economic analysis
1971
Goldstein, Jon H. |
Drainage
Wetland drainage in Europe : the effects of agricultural policy in four EEC countries
1984
Baldock, David |
Hermans, Ben |
Kelly, Patricia |
Mermet, Laurent |
Nature conservation and the management of drainage channels
1989
Newbold, Chris |
Honnor, John |
Buckley, Karen |
