OTTO
\ˈɒtə͡ʊ], \ˈɒtəʊ], \ˈɒ_t_əʊ]\
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1919
- The Concise Standard Dictionary of the English Language
By James Champlin Fernald
1908
- Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson
1919
- The concise Oxford dictionary of current English
By Sir Augustus Henry
1895
- Glossary of terms and phrases
By Henry Percy Smith