They Assumed the Enemy in Vietnam Was Incapable of Intercepting Radio Communications. They Were Wrong
SCR-300 WW2 Radio Backpack: The "Walkie Talkie" That Shaped the War
Cold War Radio: The Russian Broadcasts of the Voice of America and Radio Free Europe/Radio Liberty: Pomar, Dr. Mark G.: 9781640125148: Amazon.com: Books
File:Vietnam War Chinese military radio.JPG - Wikimedia Commons