Portable radios

The Zenith Trans-Oceanic: the royalty of radios

John H. Bryant and Harold N. Cones.

Shortwave Listening on the Road: The World Traveler's Guide

Andrew R. Yoder

Radio headsets in the workplace

Gary T. Spencer.

Seeing, Selling, and Situating Radio in Canada 1922-1956

Anne MacLennan, Michael Windover

Portable transistor radio and radiogram.

Ivan Frederick Gregory

Dry-battery recievers with miniature valves.

E. Rodenhuis

Das Versprechen mobiler Freiheit: zur Kultur- und Technikgeschichte von Kofferradio, Walkman und Handy

Heike Weber.

German Radio Sets

Pierre Metsu

The portable radio in American life

Michael Brian Schiffer.

Personal radio guide: 203-83

prepared for the National Institute of Justice by John F. Shafer and the Law Enforcement Standards Laboratory, National Engineering Laboratory, National Bureau of Standards