Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAKAHARA Masayuki,"Characteristic of Water Resources in the Sahel Region, West Africa. A Case Study in the Goroubi Drainage Basin in the Republic of Niger and Burkina Faso.",Journal of the Japan Society of Engineering Geology,02867737,Japan Society of Engineering Geology,1999,40,3,137-148,https://cir.nii.ac.jp/crid/1390001204096242560,https://doi.org/10.5110/jjseg.40.137