Duff, C., & O'Duffy, E. (1933). The basis and essentials of French: Containing all that must be known of grammar, vocabulary and idioms in order to express the most frequently recurring ideas. Harmsworth.
MLA CitationDuff, Charles, and Eimar O'Duffy. The Basis and Essentials of French: Containing All That Must Be Known of Grammar, Vocabulary and Idioms in Order to Express the Most Frequently Recurring Ideas. Harmsworth, 1933.
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