00807cam a22002411 4500 gs 30000221 DLC 20260227111334.0 780410s1930 pauab b 000 0 eng c gs 30000221 (OCoLC)3791430 U.S. Geol. Survey. Libr. OT P OCoLC DLC GB605.P4 S7 PY G345/4.3 G3 padocs Stone, Ralph W. (Ralph Walter), 1876-1964. Pennsylvania caves, by Ralph W. Stone. Harrisburg, Department of internal affairs, Topographic and geologic survey, 1930. 63 p. incl. illus., maps. 23 cm. Pennsylvania. Geological survey (4th, 1919- ) Bulletin G3 Bibliographical footnotes. Caves. Bulletin G, 3. 26810 26810