Vacuum tube amplifiers, ed. by George E. Valley Jr. a and Henry Wallman [under the supervision of the] Office of Scientific Research and Development, National Defense Research Committee. Valley, George E. 1913- ed. Wallman, Henry., joint ed. Amplifiers, Vacuum-tube. Electronic apparatus and appliances. TK7872.A5 V3 621.384 VAV Includes index. New York : McGraw-Hill, c1948. c1948. 1948 Text xvii, 743 p. : eng