Authors: O
- O'Brien, Cyril J. 1919-2011 1 book
- Playfair, William 1759-1823 1 book
- Schäfer, Rudolf 1878-1961 1 book
- Bertelsen, Sophia Yhlen-Olsen 1876-1934 1 book
- Association of Official Agricultural Chemists (U.S.) - 1 book
- O'Malley, Charles Donald - 1 book
- Wildermuth, Ottilie 1817-1877 1 book
- I. J. Hochman's Yiddisher Orchester - 1 book
- Gilbert, Olive - 1 book
- Lowth, Robert 1710-1787 1 book
- Small, F. O. (Frank O.) 1860-1915 1 book
- Custance, Olive 1874-1944 1 book
- Ollilainen, Pekka - 1 book
- Oakesmith, John - 1 book
- Montorgueil, Georges 1857-1933 1 book
- Schoonmaker, Oliver 1882-1968 1 book
- Coursey, O. W. (Oscar William) 1873-1946 1 book
- Owen, Robert L. (Robert Latham) 1856-1947 1 book
- Wilson, J. O. - 1 book
- Masterman, Charles F. G. (Charles Frederick Gurney) 1873-1927 1 book
- Seifert, Otto 1853-1933 1 book
- O'Meara, James 1825-1903 1 book
- Orcutt, Philip Dana - 1 book
- Beyer, H. Otley (Henry Otley) 1883-1966 1 book
- Ormonde, John Butler, Marquis of 1808-1854 1 book
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