Implications of the UN/WTO tourism definitions for the U.S. tourism statistical systemDouglas C. Frechtling · First published 1995 · Latest edition 1996Open the Tome
Annotated bibliography on health and tourism issuesDouglas C. Frechtling · First published 1992Open the Tome
Travel economic impact modelDouglas C. Frechtling, United States Travel Data Center, United States. Bureau of Land Management · First published 1975Open the Tome