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 "García-Colón, Ismael",Colonial migrants at the heart of empire : Puerto Rican workers on U.S. farms,,University of California Press,2020,American crossroads,,9780520325784,,https://cir.nii.ac.jp/crid/1130003903371089152