^{Welten im Zusammenstoss
(Worlds in Collision)}

Dr. Immanuel Velikovsky

translated from English by
F. W. Gutbrod and Dr. Thomas Hoffmann

2005, Perfect bound
468 pages

ISBN 3-934402-91-7
ISBN-13: 978-3934402911

^{Erde im Aufruhr
(Earth in Upheaval)}

Dr. Immanuel Velikovsky

translated from English by Christoph Marx

2005, Perfect bound
320 pages

ISBN 3-934402-90-9
ISBN-13: 978-3934402904