Freedom to travel / European Travel Commission
Alguns elementos sobre a economia portuguesa / Secretaria de Estado da Informação e Turismo
L'industrialisation du tourisme dans les regions en voie de developpement / Elio Galeotti; UIOOT - Union Internationale des Organismes Officiels de Tourisme
Minutes of the meeting held in Sweden House, Stockholm / European Travel Commission
Inter-governmental conference on tourism Sofia, Bulgária, May 15-28 1969 - Record of proceedings / UIOOT