Mineral resources of the Elders ridge quadrangle, Pennsylvania /
Stone, Ralph W. 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 . - Geological Survey (U.S.). Bulletin ; no. 256. .
Subject series: A, Economic geology, 51; B, Descriptive geology, 63. Includes index.
gs 05000908
Mines and mineral resources--Pennsylvania--Elders ridge quadrangle.
Geology--Pennsylvania--Elders ridge quadrangle.
QE75 / .B9 no. 256
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 . - Geological Survey (U.S.). Bulletin ; no. 256. .
Subject series: A, Economic geology, 51; B, Descriptive geology, 63. Includes index.
gs 05000908
Mines and mineral resources--Pennsylvania--Elders ridge quadrangle.
Geology--Pennsylvania--Elders ridge quadrangle.
QE75 / .B9 no. 256