Map of the continental United States showing major basin areas and sampling sites along 36 rivers [peta]
42
| Format: | |
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| Published: |
Washington, D.C. : U.S. Government Printing Office,
1969
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| Subjects: |
42
| Format: | |
|---|---|
| Published: |
Washington, D.C. : U.S. Government Printing Office,
1969
|
| Subjects: |