Two Ocean Pass. United States Geological Survey. 1996. Wikimedia Commons [database online]. [Cited 1 February 2016] Available from Wikimedia Commons.
Location
Brinkerhoff Geology Library & online
Scope
The Geology Library houses a collection of USGS topographic maps at scales of 1:24,000, 1:100,000, and 1:250,000. All editions for Wyoming and only the most current editions for other states are retained.
Finding print USGS Topographic Maps
​USGS Topo Maps Online