by Poul Anderson
Paperback
details (United Kingdom).
(see also: eBook (Kindle) · Audible Audiobook)
details (United States).
(see also: Audible Audiobook · eBook (Kindle))
details (Germany).
(see also: Kindle Ausgabe · Audible Hörbuch · Kindle Ausgabe)
details (Canada).
(see also: eBook (Kindle) · Audible Audiobook)
ISBN: 978-0-7221-1160-4
ISBN-10: 0-7221-1160-6
Sphere · 1974