Berlin: Sprachmittler - Verlag, 1943. Octavo, staple-bound, printed wrappers, [ii], 166 pp., illustrated throughout with black-and-white diagrams, six detailed fold-out diagrams included (unpaginated). Cover worn and water marked at spine and edges, foxing on edges of text block, light foxing on title page, pale water marks on lower right-hand corners..... More