Dann, G. M. S. (1996). The language of tourism: a sociolinguistic perspective.
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Brecx, M., Netuschil, L., Reichert, B., & Schreil, G. (1990). Efficacy of Listerine, Meridol and chlorhexidine mouthrinses on plaque, gingivitis and plaque bacteria vitality. J Clin Periodontol, 17(5), 292–297.
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