... ( 199 1) Dictionary of Aviation, Oxford: BSP Professional BooksHarris, R. and Howard, J. ( 199 6) Dictionary of Travel, Tourism and Hospitality Terms,Melbourne: Hospitality PressHart, N.A. ( 199 6) ... Encyclopedia of Tourism, London: RoutledgeJeffries, D. (2001) Governments and Tourism, Oxford: Butterworth–HeinemannKhan, M., Olsen, M. and Var, Turgut ( 199 3)VNR’s Encyclopaedia of Hospitality and Tourism, New ... Leisure Travel and Tourism Handbook, London: Hodder &StoughtonDictionaries ...