. . . . . . . . . . . . . . . "Dangers to workers from dusts and fumes and methods of protection" . "Dangers to workers from dusts and fumes and methods of protection"@en . . . "Dangers to workers from dusts and fumes, and methods of protection" . . . . . . . . . . . . . . "Pictorial works"@en . . . . . . "Occupational diseases Health aspects." . . "Hazardous occupations." . . "Factories Safety appliances." . . "U. S. Department of Labor. Bureau of Labor Statistics (Washington)" . .