German in 20 lessons, intended for private study and for use in schools : with a new system simplified phonetic pronunciation : based on the method of R. Diez de la Cortina - Lange, Eva C (New York : R. D. Cortina Co. ; Garden City, N.Y. : distributors, Doubleday, 1962)
Firstth ed. published under title: Cortinas German in 20 lessons
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Keywords: German language -- Textbooks for foreign speakers -- English