COLLINS, A. FREDERICK.
The radio amateur's handbook; a complete, authentic, and informative work on radio telegraphy and telephony. 7th ed., rev. by George C. Baxter Rowe; introd. by Donald McNicol.
COLLINS, A. FREDERICK. The radio amateur's handbook; a complete, authentic, and informative work on radio telegraphy and telephony. 7th ed., rev. by George C. Baxter Rowe; introd. by Donald McNicol. © 10Mar33; A60620. Thomas Y. Crowell Co. (PWH); 9Mar61; R273517.
Thomas Y. Crowell Co.|PWH