EIGHT SOFTCOVER BOOKS FROM THE PUBLIC ADDRESS SERIES BY NATIONAL RADIO INSTITUTE. 1951 OR 1952 EDITIONS. - P.A. TRANSMISSION SYSTEMS
- ACOUSTICS IN PUBLIC ADDRESS WORK
- COMMERCIAL P.A. SYSTEMS
- MAINTENANCE OF P.A. SYSTEMS
- INTRO TO PUBLIC ADDRESS
- SPECIAL P.A. SYSTEMS-1953 EDITION
- HOW TO ELIMINATE DISTORION SERVICING LOUDSPEAKERS 42RH-1-NOT IN PHOTO
- HOW LOW CONE TYPE LOUDSPEAKERS WORK. 27FR-2 NOT IN PHOTO 1950 EDITION
02-2024 REV