Onji Norio
Ootaka Yukie
Openshaw Graham
Orban Andre
Orban Andre E.
Orban Jacques Joseph Henri
Orrange John J.
Ortiz Ricardo
Osadchii Evgenii Grigorevitch
Osler John Collamer
Osservatorio Geofisico Sperimentale
Ostermeier Richard Martin
Ostrander William J.
Ostrovsky Anatoly P.
Osypov Konstantin Sergeevich
Otis Robert M.
Ottleben Bernd
Ottleben Petra
Ottsen Henning
Ounadjela Abderrhamane