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Oberholtzer, Ellis Paxson 1868-1936
O'Brien, Edward J. (Edward Joseph) 1890-1941
Ochoa, Enrique -
Odell, E. G. 1886-1929
Odhner, Einar 1884-1973
Odle, E. V. (Edwin Vincent) 1890-1942
O'Donnell, Elliott 1872-1965
Oesterley, W. O. E. (William Oscar Emil) 1866-1950
Offenbach, Jacques 1819-1880
O'Harra, Edwin V. -
Ohrenschall, Helen E. -
Oikonomides, D. E. (Demosthenes E.) 1858-1938
Okellos, ho Leukanos, active 6th century B.C. -
Oland, Edith 1878-1968
Old Elizabeth 1766-
Oldmeadow, Ernest 1867-1949
O'Leary, De Lacy 1872-1957
Oliver, Eda A. -
Ollier, Edmund 1827-1886
Ollilainen, A. E. -
Olmstead, A. T. (Albert Ten Eyck) 1880-1945
Olmsted, Everett Ward 1869-
Olsen, Julius E. -
Olson, Ernst W. (Ernst Wilhelm) 1870-1958
Olson, Julius E. -
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