Tourism satellite account (TSA) / World Tourism Organization
Tourism 2000 - building a sustainable future for Asia-Pacific : preliminary report / World Tourism Organization
Awards for improving the coastal environment: the example of the blue flag / coord. Aloisi de Larderel, Peter Shackleford, Jan Eriksen, Lene Andersen
Inter-governmental conference on tourism Sofia, Bulgária, May 15-28 1969 - Record of proceedings / UIOOT
The least developed countries and international tourism / World Tourism Organization