Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
United States. Bureau of Labor Statistics,"Employee benefits in medium and large private establishments, 1997",,"U. S. Dept. of Labor, Bureau of Labor Statistics ; [for sale by the U.S. G.P.O.]",1999,Bulletin,,0160501865,,https://cir.nii.ac.jp/crid/1130000794222238720