01611oam 2200493 450 991070398460332120150824164406.0(CKB)5470000002435892(OCoLC)882122665(OCoLC)654444422(EXLCZ)99547000000243589220140630d1905 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierLimestones of southwestern Pennsylvania /by Frederick G. ClappWashington, D.C. :Department of the Interior, United States Geological Survey,1905.Washington :Government Printing Office.1 online resource (52 pages, VII pages of plates) illustrations, mapsGeological Survey / Bulletin ;no. 249Series A, Economic geology, 42Series B, Descriptive geology, 53Title from title screen (viewed June 26, 2014).Includes bibliographical references and index.LimestonePennsylvaniaLimestonefastPennsylvaniafastLimestoneLimestone.Clapp Frederick G(Frederick Gardner),1879-1944,1386672Geological Survey (U.S.),COPCOPOCLCOOCLCEOCLCFOCLCATRAALGPOBOOK9910703984603321Limestones of southwestern Pennsylvania3521667UNINA