Ullerich, Dirk
[S.l.: s.n.]
Integrated quality management in tourism. - proceedings [on] European Tourism Forum of the Austrian Presidency of the Council of the European Union and the European Commission, Vienna, 1998, p. 209-210; 7526.33
Projectos; Energias renováveis; Conservação de energia; Actividade turística; Protecção do ambiente; CEE