MEISLER, Harold Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle Pennsylvania / by Harold Meisler and Albert E. Becher. -- Washington : United States Government Printing Office, 1968 - 14 p. -- (Geological Survey Bulletin ; 1254-G). Subjects--Topical Terms: CámbricoEstratigrafíaOrdovícicoPennsylvania Universal Decimal Class. No.: 551.732/.733(748)