LeRoy Miller rated QRM-Interplanetary: 4 stars
QRM-Interplanetary by George O. Smith
QRM—International code signal meaning "Interference" of controllable nature, such as man-made static, cross modulation from another channel adjoining or willful …
QRM—International code signal meaning "Interference" of controllable nature, such as man-made static, cross modulation from another channel adjoining or willful …