American scholarship in the twentieth century /

Eitemau Tebyg

• Twentieth century unlimited : From the vantage point of the first fifty years /
  Cyhoeddwyd: (1950)
• American perspectives : The national self-image in the twentieth century /
  gan: Spiller, Robert E.
  Cyhoeddwyd: (1961)
• Nature and the American : Three centuries of changing attitudes /
  gan: Huth, Hans
  Cyhoeddwyd: (1957)
• America and Americans /
  gan: Steinbeck John
  Cyhoeddwyd: (1966)
• America and Americans /
  gan: Steinbeck, John
  Cyhoeddwyd: (1966)