Manpower in tourism proceedings of the 29th Congress of the Association Internationale d' Experts Scientifiques du Tourisme , Droujba pres de Varna (Bulgarie), 2-8 September 1979. - Congress of the Association Internationale d' Experts Scientifiques du Tourisme Bulgary) 1979 (Berne, Switzerland AIEST, 1979)
Keywords: Tourism -- Social aspects -- Congresses