Nina Grace S.J. Flores, Assessment of sustainability of tourism course in Our Lady of Perpetual Succor College / Nina Grace Flores - Marikina City: OLOPSC, March 201 - vi, 42pages: color illustration; 28cm. Includes: references Nat. Bib. No.: Subjects--Topical Terms: TourismTourism--Language LC Class. No.: LG 993.5 F628 2014 / THE00014