Negi, Jagmohan . Tourism and travel : concepts & principles / Jagmohan Negi. - New Delhi : Gitanjali Publishing House , 1990. - xxiv,524p. : illus.,figs. ; 23cm . Includes Bibliography & Index ISBN: 8185060339 Rs.450 Subjects--Index Terms: TRAVEL Dewey Class. No.: 338.4791 / NEG/T