- (1976) Indo-European Eschatology: A Model
| Volume 4, p. 295
| - (1980) Social Organization in Western Indo-European
| Volume 8, p. 123
| - (1982) Dioscuric Elements in Celtic and Germanic Mythology
| Volume 10, p. 117
| | O'Sullivan, Muiris
| - (1991) Passage Tomb Art of Western Europe
| Volume 19, p. 15
| | Ogibenin, B. L.
| - (1974) Baltic Evidence and the Indo-Iranian Prayer
| Volume 2, p. 23
| | Oguibénine, Boris
| - (1981) IE *lew(H) in Middle Indo-Aryan and Its Baltic Cognates
| Volume 9, p. 303
| - (1984) Cosmic Tree in Vedic and Tamil Mythology: Constrastive Analysis
| Volume 12, p. 367
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(2008) New Type Word Indexes for Use in Sanskrit Philology
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Volume 36, p. 148
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| Ohkuma, Keishiro
| - (1986) Kingship in Ancient Ireland
| Volume 14, p. 231
| | Olmstead, Garrett
| - (1988) Ordinal Numerals in the Gaulish Coligny Calendar
| Volume 16, p. 267
| - (1989) The Meter of the Gaulish Inscription from Larzac
| Volume 17, p. 155
| - (1991) Gaulish, Celtiberian and Indo-European Verse
| Volume 19, p. 259
| | Opie, James
| - (1995) Xinjiang Remains and the 'Tocharian Problem'
| Volume 23, p. 431
| | Orr, Robert
| - (1986) Some Developments in Final Syllables in Slavic - A New Synthesis (A Comment on Jasanoff, Schmalstieg, and Kortlandt)
| Volume 14, p. 173
| | Oshiro, Terumasa
| - (1988) The Relative Conjunctions in Hieroglyphic Luwain
| Volume 16, p. 9
| - (1989) On Hieroglyphic Luwain Sign sú or zù
| Volume 17, p. 181
| | Østmo, Einar
| - (1997) Horses, Indo-Europeans and the Importance of Ships
| Volume 25, p. 285
| | Owens, Gareth
| - (1999) The Structure of the Minoan Language
| Volume 27, p. 15
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