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 "Custer, William S.",Employer health care plan design and plan cost : analysis of claims data from employers in the Los Angeles Area,,Employee Benefit Research Institute,1991,An EBRI special report,,,,https://cir.nii.ac.jp/crid/1130000797832579456