Vacuum tubes.
Spangenberg, Karl R.
Vacuum tubes. - 1st ed. - New York, McGraw-Hill Book Co., 1948. - xvii, 860 p. illus., diagrs. 24 cm.
Vacuum-tubes
621.384132 / SPA
Vacuum tubes. - 1st ed. - New York, McGraw-Hill Book Co., 1948. - xvii, 860 p. illus., diagrs. 24 cm.
Vacuum-tubes
621.384132 / SPA