Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Northrup, James P. and Wharton School. Industrial Research Unit","Old age, handicapped, and Vietnam-era antidiscrimination legislation",Rev. ed,"Industrial Research Unit, Wharton School, University of Pennsylvania",1980,Labor relations and public policy series,,0895460203,,https://cir.nii.ac.jp/crid/1130282269769640960