Trimetrogon Section, U.S. Geological Survey Topographic Division. Location unknown. 1952.
Dates
Date Taken
1952
Summary
Album caption: Trimetrogon Section, a large slotted templet layout. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
Summary
Album caption: Trimetrogon Section, a large slotted templet layout.
No index card.
Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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tope0234.jpg
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tope0234.tif
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Material Request Instructions
Available in the U.S. Geological Survey, Denver Library Photographic Collection, Subject Album area, Topography E Collection, Book 6: Trimetrogon Plotting Instruments, Misc. Equipment, Exhibits.
Rights
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