Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
United States. Bureau of Labor Statistics,Injuries and accident causes in the manufacture of clay construction products,,"U.S. Dept. of Labor, Bureau of Labor Statistics,For sale by the Supt. of Docs., U.S. Govt. Print. Off.",1951,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000795109339008