Umfrid, O. Archivmaterialien zu Otto Umfrid, 1857-1920.
Chicago Style (17th ed.) CitationUmfrid, Otto. Archivmaterialien Zu Otto Umfrid, 1857-1920.
MLA (9th ed.) CitationUmfrid, Otto. Archivmaterialien Zu Otto Umfrid, 1857-1920.
Warning: These citations may not always be 100% accurate.