"Area development bulletin."; "Potomac Edison Company."; "Potomac Edison Company--Periodicals."; "Industrialization--Maryland--Periodicals.", "Industries--Maryland--Periodicals.", "Industrialization--Pennsylvania--Periodicals.", "Industrialization--West Virginia--Periodicals.", "Industries--Pennsylvania--Periodicals.", "Industries--Virginia--Periodicals.", "Industrialization--Virginia--Periodicals.", "Industries--West Virginia--Periodicals."; "Potomac Edison Company."; "1959-1963"; "

Serial. Printed Ephemera Collection has: 1959:Aug., 1959:Nov., 1960:Mar., 1960:May, 1960:Sept., 1961:July, 1962:Apr., 1962:Oct., 1963:Apr. Some issues lack enumeration and chronology.

"; ""; "P12808"; "pec"; "Industrialization--Pennsylvania--Periodicals.", "Industries--Maryland--Periodicals.", "Potomac Edison Company--Periodicals.", "Industrialization--Maryland--Periodicals.", "Industrialization--Virginia--Periodicals.", "Industrialization--West Virginia--Periodicals.", "Industries--West Virginia--Periodicals.", "Industries--Virginia--Periodicals.", "Industries--Pennsylvania--Periodicals."; "14256"; .