Found In: Beinecke Rare Book and Manuscript Library > Frederick Samuel Dellenbaugh collection of photographs and drawings of the Colorado River region. (WA PHOTOS 271) > Photographs > U.S. DEPARTMENT OF THE INTERIOR / Collection Title: Frederick Samuel Dellenbaugh collection of photographs and drawings of the Colorado River region. (WA PHOTOS 271) / Repository: Beinecke Rare Book and Manuscript Library / Grouping: Series I: Photographs