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
"Watkins, Ralph J. (Ralph James), b. 1896 and Surveys & Research Corporation and Ecuador. Junta Nacional de Planificación y Coordinaciòn Económica",Expanding Ecuador's exports : a commodity-by-commodity study with projections to 1973,,Praeger,1967,Praeger special studies in international economics and development,,,,https://cir.nii.ac.jp/crid/1130000798112717568