. . . . "Atmospheric Pollution of American cities for the years 1931 to 1933" . . . . . . . . . . . . . . "Atmospheric pollution of American cities for the years 1931 to 1933, with special reference to the solid constituents of the pollution" . . . "Atmospheric pollution of American cities for the years 1931 to 1933 with special reference to the solid constituents of the pollution"@en . "Atmospheric pollution of American cities for the years 1931 to 1933 with special reference to the solid constituents of the pollution" . . . . .