German in 20 lessons, intended for self-study and for use in schools : with a simplified system of 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, 1977)
First-6th ed. published under title: Cortina's German in 20 lessons.
Keywords: German language -- Textbooks for foreign speakers -- English