Foregleams of the Declaration of Independence in the Thirteenth Century. Records of the American Catholic Historical Society of Philadelphia. Volume XIX. Pages 59-65.

Eitemau Tebyg

• The faith of the signers of the Declaration of Independence.
  gan: Perry, William Stevens, 1832-1898
  Wedi'i Greu: (1893)
• The popes and heresy in the thirteenth century.
  gan: Shannon, Albert Clement, 1918-
  Wedi'i Greu: (1949)
• The popes and heresy in the thirteenth century.
  gan: Shannon, Albert Clement, 1918-
  Wedi'i Greu: (1949)
• English synodalia of the thirteenth century,
  gan: Cheney, C. R. (Christopher Robert), 1906-
  Wedi'i Greu: (1941)
• English synodalia of the thirteenth century,
  gan: Cheney, C. R. (Christopher Robert), 1906-
  Wedi'i Greu: (1968)