Cambridge: General Radio Company, 1947. Edition Unstated. Softcover. General Radio Company, Cambridge, 1947. Edition Unstated. Very Good Condition. Trade Catalog -- Moderate rubbing to the extremities. Internally clean, binding sound. -- The catalog Includes Stroboscopes, Variacs, Sound-Level Meters, Vibration Meters, Impedance Bridges, Signal Generators, Oscillators, Wave Analyzers, Distortion Meters, Impedance..... More