"釧路湿原国立公園" [Kushiro Shitsugen National Park]. Dijitaru daijisen (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-06-18.
"釧路湿原国立公園" [Kushiro Shitsugen National Park]. Dijitaru daijisen (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-06-18.
"釧路湿原国立公園" [Kushiro Shitsugen National Park]. Dijitaru daijisen (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-06-18.