| Walker & Fagersteen From Glacier Point 3,200 feet above Yosemite Valley Cal. [Photographic Views of Yosemite and Mammoth Trees.] n.d. Stereocard, detail Bancroft Library, University of California Berkeley Charles L. Camp Collection of Stereographs, Identifier: 16391 LL/38295 Publisher: Walker & Fargersteen [Fagersteen] / Successors to M. M. Hazeltine.
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