00894cam a22002411 4500 gs 38000043 DLC 20260227111342.0 750613s1933 paua 000 0 eng gs 38000043 (OCoLC)1391746 DLC OT OCoLC DLC premarc TN24.P4 A7 Ashley, Geo. H. (George Hall), 1866- The undeveloped mineral resources of Pennsylvania / introduction by George H. Ashley. Harrisburg, Pa. : Department of internal affairs, Topographic and geologic survey, 1933. 16 p. : incl. tables ; 23 cm. Pennsylvania. Geological survey, 4th (1919- ) Bulletin M18-A At head of title: Pennysylvania Geological survey, Fourth series. Mines and mineral resources Pennsylvania. Bulletin M ; 18-A. 27414 27414