History of Labour in the United StatesJohn Rogers Commons, David Joseph Saposs, Helen Laura Sumner · First published 2015Open the Tome
History of Labour in the United States; Volume 2Helen Laura Sumner, David Joseph Saposs, Edward Becker Mittelman · First published 2018Open the Tome
Brief for National Labor Relations BoardDavid Joseph Saposs, George S. Wheeler, United States. Department of Justice, United States. National Labor Relations Board, Jones & Laughlin Steel Corporation · First published 1937Open the Tome
Brief for the National Labor Relations BoardDavid Joseph Saposs, George S. Wheeler, United States. Department of Justice, United States. National Labor Relations Board, Associated Press · First published 1937Open the Tome
