Short description: In Russian. Efimov, Nikolai Vladimirovich. An introduction to the theory of external forms. Moscow: Science, 1977. Vvedenie v teoriyu vneshnikh form. In Russian /An introduction to the theory of external forms. The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU7671760