Author: Ratté, J.C., & Steven, Th.A., 1967.:
Title: Ash flows and related volcanic rocks associated with the Creede Caldera, San Juan Mountains, Colorado. [U.S. Geol. Surv. Prof. Pap., 524-H.]
Description: Washington 1967. 4to. Pp. viii,58, double-page col. photogr. frontisp., 26 figs. and photos, 1 fold. col. geol. map in pocket, bibliogr. Orig. wrappers.

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