Limit your search
Creator
- France 3
- Germany (West) 2
- Germany 1
- Luxembourg 1
Topic
- Water quality 3
Region
- France 3
- Germany 3
- Luxembourg 1
Water Basin
- Meuse >> Netherlands 3
- Rhine River >> Netherlands 3
- Rhine-Meuse 3
Language
- English 3
- Spanish | Castilian 1
Type
- Text 2
- Collection 1
Institution
- Oregon State University 3
Decade
- 1960-1969 3