"Notes on the coal measures of Beaver County, Pennsylvania. "; "White, I. C. (Israel Charles), 1848-1927."; "Coal--Pennsylvania--Beaver County."; "White, I. C. (Israel Charles), 1848-1927."; "1874"; "Journal article reprint from: Annals of the Lyceum of Natural History, v.11 (1874:June).
"; ""; "P5132"; "pec"; "Coal--Pennsylvania--Beaver County."; "14256"; .