Author
American Federation of Labor
2
American Federation of Labor. Convention
2
American Federation of Labor. Metal Trades Department
2
Communist Party of the United States of America
1
Communist Party of the United States of America (Calif.)
1
Danish, Max D., 1895-
1
Fay, Charles Norman, 1848-
1
Flexner, Jean Atherton
2
Foner, Philip Sheldon, 1910-
1
Gompers, Samuel, 1850-1924
1
Harvey, Rowland Hill
1
Helbing, Albert Theodore
1
Lawson, George W.
1
Levinson, Edward, 1901-1945
1
Lewis, Ronald L., 1940-
1
Lorwin, Lewis L. 1883-1970
2
Lufft, Hermann
2
Philadelphia Record
3
Roberts, William Clark, 1856-
1
State Historical Society of Wisconsin
1
Taft, Philip, 1902-
2
Thorne, Florence Calvert
1