Alphabetischer Index der Autoren - O
- Oppong, Felix
- Oppong, Goodenough D.
- Oppong, Goodenough Dennis
- Oppong, Judith
- Oppong, Kofi
- Oppong, R. A.
- Oppong, Stephen
- Oppong-Yeboah, Nana Yaw
- Opravil, Tomáš
- Oprea, Daniela
- Oprea, Georgeta-Madalina
- Oprea, Stefan
- Oprean, Danielle
- Oprecht, Ulrich
- Opreni, Andrea
- Oprescu, Radu
- Oprešnik, Samuel Rodman
- Opricovic, Serafim
- Opris, Dorina M.
- Opriş, Ioana
- Oprişan, Gabriel
- Opršal, J.
- Oprsaľ, M.
- Opryshko, F. G.
- Opschoor, G.
- Opsommer, Ann
- Opstad, Kristen
- Opstal, André
- Opu, Raihan Khan
- Opudo, J.
- Opulencia, Maria Jade Catalan
- Oputa, Chinedu W.
- Opyrchał, Leszek
- Oquendo, V.
- Oquendo-Di Cosola, Valentina
- Oquendo-Machado, Yanisleidy
- Öqvist, Rikard
- Or, Dani
- Or, George K. C.
- Or, S. W.
- Or, Siu Wing
- Orabi, Ismail I.
- Orabi, M. Anwar
- Orabi, Mhd Anwar
- Orabi, Rahaf
- Orabi, Wallied
- Orabona, Edoardo
- Oraby, Tamer
- Orach, Christopher Garimoi
- Orad Aragón, José
- Orady, E. A.
- Oraee, H.
- Oraee, Mehran
- Oraibi, W. K.
- Oraie, M. A.
- Oraim, Hassan
- Oraiopoulos, Argyris
- Orak, Mehmet Sefa
- Orakcal, K.
- Orakcal, Kutay