Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
United States. Bureau of Labor Statistics,"Employee earnings and hours at retail building materials, hardware, and farm equipment dealers",,"U.S. Dept. of Labor, Bureau of Labor Statistics,For sale by the Supt. of Docs., U.S. Govt. Print. Off.",1968,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000795191756416