| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| 1985-86 Outlook for Travel and Tourism: Proceedings of the 11th Annual Travel Outlook Forum | 978-99956-06-91-6 (99956-06-91-7) | 1985 | Travel & Tourism Research Assn |
| 1991 Travel Market Report: Results of the National Travel Survey Tabulations | 978-99929-3-948-2 (99929-3-948-6) | 1992 | |
S D · S. T. · S.T.D. · T D · U. D. · U. S. · United States Travel Data Center