01019cam a22002651i 4500 gs 05000908 DLC 20260227111302.0 790209s1905 dcuabf f001 0 eng gs 05000908 (OCoLC)4636399 DLC ICharE DLC n-us-pa QE75 .B9 no. 256 Stone, Ralph W. (Ralph Walter), 1876-1964. Mineral resources of the Elders ridge quadrangle, Pennsylvania / by Ralph W. Stone. Washington, Govt. Print. Off., 1905. 86, v p. : ill., xii pl. (incl. fol. map in pocket) diagrs.; 24 cm. U.S. Geological survey. Bulletin no. 256 Subject series: A, Economic geology, 51; B, Descriptive geology, 63. Includes index. Mines and mineral resources Pennsylvania Elders ridge quadrangle. Geology Pennsylvania Elders ridge quadrangle. Geological Survey (U.S.). Bulletin ; no. 256. 24317 24317