Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Morikiyo Toshiro and Iwamasa Kazuo and Kanisawa Satoshi and Ehiro Masayuki,"Origin of the phosphate and carbonate rocks in the Toyoman Series, Kitakami Mountains, northern Japan-Carbon and sulfur isotopic study(The global carbon cycle)",Earth Science (Chikyu Kagaku),03666611,The Association for the Geological Collaboration in Japan,1994,48,5,417-431,https://cir.nii.ac.jp/crid/1390282679210581760,https://doi.org/10.15080/agcjchikyukagaku.48.5_417