Map of Grand Canyon National Park with hand-colored boundary lines, includes water tank locations.
Senator Carl T. Hayden Papers (1851-1979) Grand Canyon National Park- approach road, congressional committee visit, misc. correspondence, newsletter, clippings, maps, 1924-1928. MSS 1. Greater Arizona Collection. ASU Library, Arizona State University, Tempe, AZ. http://azarchivesonline.org/xtf/view?docId=ead/asu/hayden.xml
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