@article{oai:kanazawa-u.repo.nii.ac.jp:00049578,
 author = {大沢, 毅守 and 西田, 誠 and 西田, 治文 and Ohsawa, Takeshi and Nishida, Makoto and Nishida, Harufumi},
 issue = {2},
 journal = {植物地理・分類研究, The journal of phytogeography and taxonomy},
 month = {Dec},
 pages = {97--105},
 title = {Structure and Affinities of the Petrified Plants from the Cretaceous of Northern Japan and Saghalien IX: A Petrified Cone of Sciadopitys from the Upper Cretaceous of Hokkaido},
 volume = {39},
 year = {1991}
}