納瓦特爾語主頁
Nahuatl Home Page.
http://www.mrs.umn.edu/academic/history/Nahuatl/index.htm

探索的年代。水手博物館，紐波特紐斯，梵諦岡。
The Age of Exploration. The Mariner's Museum, Newport News, VA.
http://www.mariner.org//educationalad/ageofex/

果阿史。（葡萄牙人在印度）
Goan History. (Portuguese in India.)
http://www.goacom.com/culture/history/

Cochin：阿拉伯海的女王。（葡萄牙人在印度）
Cochin: The Queen of the Arabian Sea. (Portuguese in India.)
http://www.geocities.com/Athens/Styx/6497/cochin.html

十五世紀中國海上實力的沈浮
The Rise and Fall of Fifteenth-Century Chinese Sea Power.
http://www.cronab.demon.co.uk/china.htm

Relaciones Geogr ficas收藏品。（十六世紀西班牙的新世界地圖，德克薩斯州大學圖書館館藏。）
The Relaciones Geográficas Collection. (Sixteenth-Century Spanish Maps of the New World from the collection of the University of Texas Library.)
http://www.lib.utexas.edu/Libs/Benson/rg/rg1.html