Preview: Radios von gestern (Radios of Yesterday): The non-fiction book for collectors and radio amateurs
Author: Ernst Erb
Hardcover edition: 456 pages including 16 color pages
Publisher: BoD – Books on Demand - 6th Edition 31. August 2020
Language: German
ISBN-10: 3751950214
ISBN-13: 978-3751950213
The Collector's Bible, originally published in 1989, updated in several editions.

Preview: RADIOKATALOG Band 1 (Radio Catalog Volume 1)
Author: Ernst Erb
Hardcover edition: 400 pages including 196 color pages
Publisher: BoD – Books on Demand - 3rd. Edition 8. März 2022
Language: German
ISBN-10: 3755768054
ISBN-13: 978-3755768050
Radio Catalog Volume 1 - First edition 1998 - Devices: Germany (major manufacturers)

Preview: RADIOKATALOG Band 2 (Radio Catalog Volume 2)
Author: Ernst Erb
Hardcover edition: 400 pages including 112 color pages
Publisher: BoD – Books on Demand - 2nd Edition. Dezember 2021
Language: German
ISBN-10: 3755736985
ISBN-13: 978-3755736981
Radio Catalog Volume 2 - First edition 2006 - Devices: Austria, Switzerland, GDR, Germany (small manufacturers)