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
"Nigerian Institute of Social and Economic Research and Smith, Robert Henry Tufrey and Hay, Alan",A theory of the spatial structure of internal trade in underdeveloped countries,,The Ibadan University Press,1969,N. I. S. E. R. Reprint series,,,,https://cir.nii.ac.jp/crid/1130000794997477632