1. Frequency of Use as a Source of Bias in On-Site Surveys of Recreationists.;Absher,1983
2. Length of Stay Problems in Tourist Research;Archer;Journal of Travel Research,1975
3. The Practice of Social Research;Babbie,1983
4. An Alternative Method of Surveying International Travelers at Frontier Points;Bailie,1976
5. Identifying Traveler Markets: Research Methodologies;Balden Associates,1978