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topoinst0042.jpg
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topoinst0042.tif
37.93 MB
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Material Request Instructions
Available in the U.S. Geological Survey, Denver Library Photographic Collection, Subject Album area, Topography Instruments Collection.
Rights
This USGS product is considered to be in the U.S. public domain. For further information on the USGS Information Policies and Instructions, refer to the Copyrights and Credits section on this web page: http://www.usgs.gov/laws/info_policies.html.