Alpert Y.L. Radio wave propagation in the ionosphere. In Russian /Alpert Ya. L. Rasprostranenie radiovoln v ionosfere. M. L. OGIZ. State Publishing House of Techno-Theoretical Literature. 1947. 276 p. 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. SKUalbc71f6033987375f9.