Human exploitation in the United States,

Eitemau Tebyg

• The rape of the American worker /
  gan: Parker, John J., 1914-
  Cyhoeddwyd: (1976)
• The deepening crisis of U.S. capitalism /
  gan: Magdoff, Harry
  Cyhoeddwyd: (1981)
• The capitalist system; a radical analysis of American society.
  gan: Edwards, Richard C., 1944-
  Cyhoeddwyd: (1972)
• Letters to Judd : an American workingman.
  gan: Sinclair, Upton, 1878-1968
  Cyhoeddwyd: (1949)
• Conservation in the United States /
  Cyhoeddwyd: (1944)