Eastman, Austin V ( 1902- ). Fundamentals of vacuum tubes, by Austin V. Eastman. - 1st ed. - New York, London, McGraw-Hill book company, inc., 1937. - xv, 438 p. illus., diagrs. 24 cm. LCCN: 37009690 Subjects--Topical Terms: TUBOS AL VACÍO Dewey Class. No.: 537.53