- Geological Survey (U.S.)
- Digital Commonwealth
- Boston Public Library
- Engraved and printed by the U.S. Geological Survey
Shows drainage features. Insets: [Aleutian Islands]--[Windward Islands]. Compiled by the U.S. Geological Survey.
- North America--Maps
- No known copyright restrictions. This work is licensed for use under a Creative Commons Attribution Non-Commercial Share Alike License (CC BY-NC-SA).