Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) "Shimizu, Makoto",Struktuer fan it Westerlauwersk Frysk : tiidwurd (3),The annual reports on cultural science,04376668,北海道大學文學部,1999-03-29,47,4,89-124,https://cir.nii.ac.jp/crid/1050001338996334848,