"Christopher Columbus" by Thomas C.Tirado, Permission Granted from ENCARTA
"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
James Axtell, "Columbian Encounters: 1992-95,"
The William and Mary Quarterly
, 3rd Series, Vol. LII, No. 4, October 1995
"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"