Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WILSON MA,Solid-state nuclear magnetic resonance spectroscopy of humic substances : basic concepts and techniques,Humic Substances,,"John Wiley & Sons, Inc.",1989,0,,310-338,https://cir.nii.ac.jp/crid/1572543024993372928,