Mary Butler1903 — 1970 · 6 obras en el catálogoObrasPPiedras Negras preliminary papersPiedras Negras preliminary papersTThe work of the Eldridge R. Johnson Middle American expeditiThe work of the Eldridge R. Johnson Middle American expeditions of the University Museum, Philadelphia, at Piedras Negras, Peten, GuatemalaAArchæological problems in Erie County PennsylvaniaArchæological problems in Erie County PennsylvaniaSSpanish contact at ChipalSpanish contact at ChipalTThree archaeological sites in Somerset County, Pennsylvania Three archaeological sites in Somerset County, Pennsylvania ..PPiedras Negras pottery ..Piedras Negras pottery ..
TThe work of the Eldridge R. Johnson Middle American expeditiThe work of the Eldridge R. Johnson Middle American expeditions of the University Museum, Philadelphia, at Piedras Negras, Peten, Guatemala
AArchæological problems in Erie County PennsylvaniaArchæological problems in Erie County Pennsylvania
TThree archaeological sites in Somerset County, Pennsylvania Three archaeological sites in Somerset County, Pennsylvania ..