Autor: LANGFORD-SMITH, F
1

LANGFORD-SMITH, F
Harrison : RCA Manufacturing Company, 1941. -
621.38 LANGF rad3
2

LANGFORD-SMITH, F
Harrison : RCA-Electron Tube Divison, 1953. -
621.38 LANGF rad
3

Sydney, Australia, : Published by the Wireless Press for Amalgamated Wireless Valve Co. Pty., 1953
621 LANGf raD