Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kaji Shigeki,Observations on the Problems of the National Language of Zaire,スワヒリ&アフリカ研究,09158758,Section of Swahili and African Studies Department of Arabic and African Languages Osaka University of Foreign Studies,1991,2,,180-185,https://cir.nii.ac.jp/crid/1390853649743105664,https://doi.org/10.18910/71071