著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI)
Munnell,Why has productivity growth declined? Productivity and public investment,New England Economic Review,,,1990,,January–February,3,https://cir.nii.ac.jp/crid/1370851343598660480,