著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Eaton, Derek and Sarch, Marie-Thérėse","The economic importance of wild resources in the Hadejia-Nguru wetlands, Nigeria",,"vrije Universiteit,International Institute for Environment and Development",1997,CREED working paper series,,,,https://cir.nii.ac.jp/crid/1130000794384661376