1. International Tourism Quarterly;‘USA’ Report No 58,1980
2. Travel Industry World Yearbook: The Big Picture;Waters,1983
3. Funding cuts emperil US tourism industry at inopportune time;Borcover;The Atlanta Constitution,1985
4. Hearing Before the Subcommittee on Business, Trade and Tourism of the US Senate Committee on Commerce, Science, and Transportation;US government,1984
5. Study of estimates of job generation in the travel and tourism industry;Corazzini,1983