| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| SAP R/3 Testing with CATT | 978-O-2O1-67517-7 (O-2O1-67517-X) | 2000 | Marcus Geiss |
G.O. · Gerard Oppermann · Gerhard Oberhammer · Gerhard Obermeyer · Gerhard Oberniedermaier · Gerhard Oberniedermeier