Author: CAMPBELL, M.R. ET AL.
Title: Geologic atlas of the United States. No. 189. Barnesboro-Patton folio, Pennsylvania.
Description: 1913. U.S. Geol. Survey, Washington. 13 pp. 11 fig. 6 plts. h.t. with col. maps. Orig. wrps. with libr. stamp, very good, folio (47x55 cm).

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