Suitbert Ertel

The Tenacious Mars Effect by Suitbert Ertel,Kenneth Irving Urania Trust Hardcover 1 March 1996 from£20.92 | RRP: ~~£15.5~~
Getting Ready to Negotiate (Penguin Business) by Danny Ertel Penguin Paperback 1 December 1996 from£13.00 | RRP: ~~£9.95~~
Interactive Physics Player Workbook: Hybrid Windows/Macintosh Version by Cindy Schwarz,John P. Ertel,MSC Software Addison Wesley Paperback 10 September 2003 from£37.13 | RRP: ~~£20.99~~