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Smith, Derek R., Takahashi, Ken. BioMed Central; 2008. Too many Japanese university students are still smoking tobacco.
Smith, Derek R., Takahashi, Ken. World Safety Organisation; 2008. The development of English-language occupational health and safety journals in Japan.
Smith, Derek R., Gehanno, Jean-Francois, Takahashi, Ken. National Institute of Occupational Safety and Health, Japan; 2008. Bibliometric research in Occupational Health (editorial).