00859nam a22002291 4500 BD-KhUET 20120723143027.0 120723s1948 nyua b 001 0 eng 48001249 DLC ODaWU OCoLC DLC BD-KhUET 621.384132 Spangenberg, Karl R. 6143 Vacuum tubes / Karl R. Spangenberg. New York : McGraw-Hill Book Co., 1948. xvii, 860 p. : illus., diagrs. ; 24 cm. McGraw-Hill electrical and electronic engineering series 5326 Includes bibliographical references and index. Vacuum-tubes. 6144 ddc BK 6480 6480 0 0 ddc 0 0 KUETCL KUETCL GEN 1977-10-27 Mullick Brothers 72.00 0 621.384132 SPA 3010004746 2012-07-23 00:00:00 1 2012-07-23 BK