Список авторов, начинающихся на [ORA]
- Oracula Graeca
- Oracula Sibyllina
- O.Radtschenko, J.Ljaskowskaja
- Orage A R
- O'Rahilly Thomas Francis
- Oral Sumner Coad
- Oram Bhaa.Vykaradpik Pini
- Oram Hiawyn
- Orandus, Eirenaeus; Орандус, Эйреней
- O.Rang
- Orange B.Chapin
- Orange Judd
- Orange Juddmpany
- Orange McNeill
- Orange Perry Barnes
- (Orange Perry Barnes) Klahowya
- Orange River Colony
- Orange Scott
- O.Rank
- Oran Burke
- Oran Edmund Randall
- Oran Lee Raber
- Oran Milo Roberts
- Oran R.Young
- Oran Smith
- Oran Young
- Orapin Laosee
- Oras F.Baker
- Oratile Thukuthe
- Oratores Attici
- orator Antiphon
- Orator Fuller Cook
- Oraye St.Franklyn
- O.Ray, CPA, PhD Whittington
- O.Ray CPA, PhD Whittington, Patrick R.CPA, PhD Delaney
- O.Ray, CPA, PhD Whittington, Patrick R., CPA, PhD Delaney
- O.Ray Whittington
- O.Ray Whittington, Patrick R.Delaney
- O.Ray Whittington, Patrick R.Delaney, Patrick R.Delaney, Ray Whittington
- Orazio Antinori
- Orazio Bacci
- Orazio Chizzola
- Orazio Comes
- Orazio de Attellis Santangelo
- Orazio Donato Gideon de Attellis Santangelo
- Orazio D'Uva
- Orazio Gianutio
- Orazio Marucchi
- Orazio Querci
- Orazio Ricasoli Rucellai
- Orazio Sechi
- Orazio Spanna
- Orazio Spanno
- Orazio Spannocchi
- Orazio Torsellino
- Orazio Viola
- Ora Allen Newlin
- Ora Delmer Foster
- Ora Fletcher Gardner
- Ora Geiger
- Ora Horn Prouser
- Ora Leopold Rathbone
- Ora Serqubo
- Ora Shtull
- Ora Williams
- Ora Willis Knight