O
- O'Hara, Geoffrey, 1882 -. (4)
- Oberammergau passion-play. (1)
- Oboists. (2)
- Oceania -- Description and travel. (2)
- Oceania. (11)
- Oceanography. (2)
- Octets. (5)
- Ojibwa Indians -- Folklore. (2)
- Ojike, Mazi Mbonu, 1914-1956. (1)
- One-act plays. (6)
- Opera -- History and criticism. (8)
- Opera and operettas. (4)
- Opera companies. (48)
- Opera programs . (22)
- Opera programs. (22)
- Opera singers. (145)
- Operalogues. (3)
- Operas and operettas. (62)
- Orators. (392)
- Orchestra. (119)
- Orchestral musicians. (21)
- Organists. (22)
- Orient -- Politics and government. (1)
- Orient -- Social conditions. (1)
- Orient. (4)
- Ornithologists. (9)
- Outrigger canoes. (1)