Used availability for Jack M Bickham's Regensburg Legacy
Hardback Editions
July 1981 : UK Hardback

Title: Regensburg Legacy
Author(s): Jack M Bickham
ISBN: 0-7091-9180-4 / 978-0-7091-9180-3 (UK edition)
Publisher: Robert Hale Ltd
Availability:
Amazon Amazon UK Amazon CA March 1980 : USA Hardback

Title: The Regensburg legacy
Author(s): Jack M Bickham
ISBN: 0-385-15546-8 / 978-0-385-15546-5 (USA edition)
Publisher: Doubleday
Availability:
Amazon Amazon UK Amazon CA Paperback Editions
October 1985 : USA Paperback

Title: Regensburg Legacy
Author(s): Jack M Bickham
ISBN: 0-8125-8088-5 / 978-0-8125-8088-4 (USA edition)
Publisher: Tom Doherty Assoc Llc
Availability:
Amazon Amazon UK Amazon CA July 1983 : USA Paperback

Title: REGENSBURG LEGACY
Author(s): Jack M Bickham
ISBN: 0-523-48062-8 / 978-0-523-48062-6 (USA edition)
Publisher: Tor Books
Availability:
Amazon CA