Sommerfeld A. Differential equations in partial derivatives of physics. In Russian /Zommerfeld A. Differentsialnye uravneniya v chastnykh proizvodnykh fiziki. Translation from German. M. Foreign lyre of 1950. 456s. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalba19cdf411fc90918.