Ultra-and extreme-short wave reception : principles, operation, and design / by Max J O Strutt. Strutt, Max J. O. (Maximilian Julius Otto), 1903- Shortwave radio. Radio Receivers and reception. 621.39411 STU Bibliography: p. 361-380. New York : D. Van Nostrand, c1947. c1947. 1947 Text xi, 387 p. : eng