W.W. · Walter Wandtke · Walter Wundsam
| title | ISBN-13 | year of publication |
|---|---|---|
| Discount Guide for Travelers: 2 | 978-0-525-93281-9 | 1983 |
| Discount Guide for Travelers 5: 2 | 978-0-525-93175-1 | 1981 |
| Discount Guide for Travelers | 978-0-525-48358-8 | 1988 |
| Discount Guide for Travelers: Third Edition | 978-0-525-48169-0 | 1985 |