http://aleph0.clarku.edu/~djoyce/mathhist/chronology.html
http://aleph0.clarku.edu/~djoyce/mathhist/time.html
http://aleph0.clarku.edu/~djoyce/mathhist/china.html
http://aleph0.clarku.edu/~djoyce/mathhist/europe.html
http://aleph0.clarku.edu/~djoyce/mathhist/greece.html
http://aleph0.clarku.edu/~djoyce/mathhist/india.html
http://aleph0.clarku.edu/~djoyce/mathhist/japan.html