Author: CHAPIN, TH.
Title: The Nelchina-Susitna region, Alaska.
Description: 1918. United States Geological Survey Bulletin 668; 67 pp. 4 fig. 6 photoplts. h.t. (of which 4 folding-out), 2 fold. & col. maps in pocket (geology, topography). Orig. wrps. libr. ticket at base of spine.

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