Ortiz, David, 1975- : Contemporary Black biography. Volume 52 : profiles from the international Black community / Sara Pendergast and Tom Pendergast, editors
Ortiz, Diego, 1508?-1571. : The Collapse of Time : The Martyrdom of Diego Ortiz (1571) by Antonio de la Calancha [1638] / Andrew Redden (Tr., Ed.) ; managing editor: Katarzyna Inga Michalak
Ortiz, Simon J., 1941- End of old horse : Short stories for students. Volume 22 : presenting analysis, context, and criticism on commonly studied short stories / Ira Mark Milne, project editor ; foreword by Thomas E. Barden
Orton, George W., 1873-1958 : The greatest athlete (you've never heard of) : Canada's first Olympic gold medallist / Mark Hebscher ; foreword by Ron MacLean
Orton, Joseph Rennard, 1795-1842. : A sphere of benevolence : the life of Joseph Orton, Wesleyan Methodist missionary (1795-1842) / Alex Tyrrell
1993
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Orton, Samuel Torrey, 1879-1948 : Everything you want to know & exactly where to find it : visual, auditory, kinesthetic : a reference guide for teachers of Orton-Gillingham and other multisensory approaches / developed by William Van Cleave