Tube Substitution Handbook

Vintage Tube Substitution Handbook No. 15 authored by Howard W. Sams, Eng. Staff

MASTER Tube SUBSTITUTION HANDBOOK - FIRST EDITION, FIRST PRINTING

Vintage 1971 Howard W. Sams Tube Substitution Handbook No.14 20829

Tube Substitution Handbook. V. 1- by Howard W Sams & Co, Howard W Sams & Co Book

English Handbook by Rod and Staff Publishers

Vintage 1971 Howard W. Sams Tube Substitution Handbook No. 14 20829

1967 HOWARD Tube Substitution Handbook Valve Vacccum Tube Pocket Book No 10