Ministry of Land,Infrastructure and Transport Hokkaido Regional Development Bureau: Obihiro Airport historyArchived 2011-07-23 at the Wayback Machine Retrieved on 7 August 2009 (in Japanese)
Ministry of Land,Infrastructure and Transport Hokkaido Regional Development Bureau: Obihiro Airport historyArchived 2011-07-23 at the Wayback Machine Retrieved on 7 August 2009 (in Japanese)