O'Regan, William. : Memoirs of the legal, literary, and political life of the late the Right Honourable John Philpot Curran, once Master of the Rolls in Ireland : comprising copious anecdotes of his wit and humour; and a selection of his poetry : interspersed with occasional biography of his distinguished contemporaries in the Senate and at the bar / By William O'Regan, Esq. ...
O'Regan, William G. : Simulation : a step toward better forest planning / by Ernest M. Gould, Jr. and William G. O'Regan.
Oregenes Adamantius, approximately 184-approximately 253 -- See Origen
Oregon Art Institute. : New look to now : French haute couture, 1947-1987 / Stephen de Pietri and Melissa Leventon with contributions by Katell le Bourhis, Marie Andrée Jouve, Caroline Rennolds Milbank.
Oregon. : Resolutions and memorial addresses on the life and character of Cyrus A. Dolph [electronic resource] : delivered at a meeting of the bench and bar held at the County Court House in ... Portland, Oregon, ... July 11th, 1914.