01646nas 2200457-a 450 991013504990332120240413024928.0(CKB)110985822456348(CONSER)a--62009833-(EXLCZ)9911098582245634820751101a19629999 -b- aengtxtrdacontentcrdamediacrrdacarrierEducational series /Pennsylvania Geologic Survey[Harrisburg, Pa.] Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey[1962]-1 online resourcePrint version: Educational series (Pennsylvania. Bureau of Topographic and Geologic Survey) (DLC)a 62009833 (OCoLC)1762046 0553-5700 Pennsylvania Geologic Survey educational seriesEduc. ser.- Pa. Geol. Surv.GeologyPennsylvaniaHydrologyPennsylvaniaMines and mineral resourcesPennsylvaniaGeologyfast(OCoLC)fst00940627Hydrologyfast(OCoLC)fst00965147Mines and mineral resourcesfast(OCoLC)fst01022541PennsylvaniafastGeologyHydrologyMines and mineral resourcesGeology.Hydrology.Mines and mineral resources.557.48/05Pennsylvania.Bureau of Topographic and Geologic Survey.JOURNAL9910135049903321exl_impl conversionEducational series2258681UNINA