Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takeya G,A study of the structure of pyridine extracts from coals by high resolution nuclear magnetic resonance spectroscopy,Bulletin of the Chemical Society of Japan,00092673,Tokyo : Chemical Society of Japan,1963-09,36,9,????,https://cir.nii.ac.jp/crid/1522825130549696512,https://doi.org/10.1246/bcsj.36.1222