O Centro : Cadernos do Centro de Organização da Memória Sócio-Cultural do Oeste de Santa-Catarina-CEOM [electronic resource].
O Claitor : A civilian's recollections of the war between the states / by H. S. Fulkerson ... 1886; edited by P. L. Rainwater ...
O Colegio : Pesquisa veterinária brasileira [electronic resource] = Brazilian journal of veterinary research : publication of the Colégio Brasileiro de Patologia Animal - CBPA.
O D Case And Company : The American year-book and national register for 1869. : Astronomical, historical, political, financial, commercial, agricultural, educational, and religious. A general view of the United States, including every department of the national and state governments: together with a brief account of foreign states. Embracing educational, religious and industrial statistics; facts relating to public institutions and societies; miscellaneous essays; important events; obituaries; etc. / Edited by David N. Camp. V. 1.