Author: HOWARD, A.D.
Title: History of the Grand Canyon of the Yellowstone.
Description: 1937, Geological Society of America, Special Paper 6; 159 pp. 31 fig. 20 plts. h.t. with phot. & maps, some folding-out, 1 col. geol. map folding-out. Orig. wrps. with libr. stamp, contents very good.

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