Twentieth century unlimited : From the vantage point of the first fifty years /

Eitemau Tebyg

• American scholarship in the twentieth century /
  Cyhoeddwyd: (1967)
• Postscript to yesterday : America-the last fifty years /
  gan: Morris, Lloyd
  Cyhoeddwyd: (1947)
• American perspectives : The national self-image in the twentieth century /
  gan: Spiller, Robert E.
  Cyhoeddwyd: (1961)
• Pioneer America : Its first three centuries /
  gan: Drepperd, Carl W.
  Cyhoeddwyd: (1949)
• Thirty years of American social and economic progress /