Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TOKUYAMA Akira,Characteristics of land waters in Okinawa Islands (I),Japanese Journal of Limnology (Rikusuigaku Zasshi),0021-5104,The Japanese Society of Limnology,2016,77,2,185-189,https://cir.nii.ac.jp/crid/1390282679038950400,https://doi.org/10.3739/rikusui.77.185