Documents / FOIA release
This is the National Intelligence Survey Gazetteer for Mexico, published by the Central Intelligence Agency in March 1956 and prepared by the Office of Geography, Department of the Interior. It contains about 53,000 entries for places and features in Mexico. It gives official standard names approved by the U.S. Board on Geographic Names along with unapproved variant names, and lists coordinates, feature designations and map references. It is marked for official use only and has no UFO content.
“Socorro”5 pages
Geographic names or their spellings do not necessarily reflect recognition of the political status of an area by the United States Government.
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FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 757 pages are in the text index: search them above, or from the library's search.