Search for all of "Mexico", all of "Boulder Canyon Project-- Maps"

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Topographic map of the Boulder Canyon Reservoir site, 1930 Scale [ca. 1:144,000. 1 in. to approx. 12,000 ft.] ; 1 map : col. ; 51 x 91 cm ; Relief shown by contours and spot heights ; "Map no. 23800" ; Includes township and range grid ; Includes two...
 

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