"Christopher Columbus" by Thomas C.Tirado, Permission Granted fromENCARTA
"When Worlds Collide" by Thomas C. Tirado, a paper presented in Cuba, October, 2000
"Cuando los mundos chocan" by Thomas C. Tirado, translation of "When Worlds Collide"
Discoverers Web: European Database on the Age of Discovery
"Quincentennial Publishing: An Ocean of Print" by David Block
"A Review of Encounter Literature" by James Axtell
"Christopher Pellegrino or Christopher Columbus" by Maurizio Tagliattini
"Studio critico sull'origine di Cristoforo Colombo" by Maurizio Tagliattini
"Turks Islands Landfall: A History of the Turks and Caicos Islands"
Columbus Ships Preservation Fund
Columbus Monuments Pages
"The Controversial Historical Image of Columbus"