00750cam a22002411 4500 gs 15000720 DLC 20260227111318.0 940914m19121914pau s000 0 eng gs 15000720 (OCoLC)31103501 DLC AkU DLC premarc n-us-pa GA61.P4 A5 Pennsylvania. Bureau of Topographic and Geologic Survey. The mineral production of Pennsylvania, 1911, 1913. Harrisburg, Pa. [1912?-14?] 2 v. 24 cm. Its Report no. 8, 11 Mines and mineral resources Pennsylvania. Pennsylvania. Bureau of Topographic and Geologic Survey. Report ; 8, 11. 25572 25572