| 1. | The overseas travel market of Japan / Japan Air LinesData Publicação: 1972 Col.autor: Japan Air Lines COTA(S): 7 |  | |
| 2. | A study of japanese travel habits and patterns / United States Department of Commerce. United States Travel Service Office of Research and AnalysisData Publicação: 1972 Col.autor: USA. Department of Commerce. Travel Service Office of Research and Analysis COTA(S): 8 | | |
| 3. | European Travel market study : European Travel Statistics- Today's data and tomorrow's needs / Stephen Wheatcroft [et al.]Data Publicação: 1972 Resp- Sec.: Wheatcroft, Stephen COTA(S): 429 | | |
| 4. | O turismo nos países socialistas europeus de leste [Estudo] / Direção Geral do TurismoCol.autor: Direcção-Geral do Turismo COTA(S): 19882 | | |