640 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "640" in English language version.

refsWebsite

Global rank English rank

1worldhistory.org

2,220^th place

1,461^st place

1,160^th place

737^th place

1uncoveredhistory.com

low place

low place

science.org (Global: 1,160^th place; English: 737^th place)

"Why 536 was 'the worst year to be alive'". sciencemag.org Nov. 15, 2018.

uncoveredhistory.com (Global: low place; English: low place)

"The Mystery of the Red Queen of Palenque". Uncovered History. December 22, 2015. Retrieved January 21, 2019.

worldhistory.org (Global: 2,220^th place; English: 1,461^st place)

"What happened to the Great Library at Alexandria?". World History Encyclopedia. February 2011. Retrieved January 9, 2020.