"Concise Columbia Electronic Encyclopedia" @ 1:814

The cited information was published by (Morningside Heights, New York, Columbia University Press, Licensed from INSO Corporation, December 31, 1941, 1994), Hard Cover & Internet Site, held in Kirk Larson (Ref: 1:814) The author/originator was Ansley, Clarke F.. This citation is considered to be direct and primary evidence used, or by dominance of the evidence.
Columbia Encyclopedia. 

• References (2)
  • Parent Source: "Concise Columbia Electronic Encyclopedia"
  • Individual: Heinrich IV Emperor of The Holy Roman Empire