Dr. Know-it-all's Rockola reference book: A compilation of Harold Hagen's reader questions & answers, Rockola information, troubleshooting, feature articles, tech hints, repairs
Chapters on: Cabinets, Cartridges and Tone Arms, Electrical, Mechanisms, Miscellaneous, Selectors and Coin Systems, Sound Systems, Speakers, Tech Hints, Wallboxes and Steppers, & Feature Articles. 168 pages.