Plesiosaur fossil from the Upper Cretaceous of Obira town, Hokkaido
北海道小平町の上部白亜系より産出した長頚竜類化石

Daisuke Nakatani, Hideo Nakaya
2008 Annual Meeting of the Geological Society of Japan  
doi:10.14863/geosocabst.2008.0.462.0 fatcat:ntjwzyupvfeexexpax5zem37ju