"Library of Congress." . . "Library of Congress" . . . . . . . . . . . . . . . . . . . . . . . . . . . "Bibliography" . . . . . . . . . . . . . . . . . . . . . . . . . "Solon J. Buck papers" . . . . "Conference papers and proceedings" . "American Historical Association." . . . . "International Congress of Expert Archivists (1948)" . . . "United States" . .