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"山武郡" [Sanbu District]. Nihon Rekishi Chimei Taikei (in Japanese). Tokyo: Shogakukan. 2012. OCLC173191044. dlc 2009238904. Archived from the original on 2007-08-25. Retrieved 2012-12-07.
worldcat.org
"山武郡" [Sanbu District]. Nihon Rekishi Chimei Taikei (in Japanese). Tokyo: Shogakukan. 2012. OCLC173191044. dlc 2009238904. Archived from the original on 2007-08-25. Retrieved 2012-12-07.
Yoshimura, Kenji (March 2, 2012). 大網白里町:名称「大網白里市」に来年1月 [Town of Ōamishirasato will be named "City of Ōamishirasato" in January 2013]. Mainichi Shinbun (in Japanese). Tokyo: Mainichi Newspapers. OCLC10684368. Archived from the original on 2012-07-10. Retrieved May 10, 2012.