540 (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "540" in Arabic language version.

refsWebsite

Global rank Arabic rank

1^st place

20^th place

22^nd place

low place

30^th place

59^th place

aryabhata.de

"El Chichon eruption implicated in Mayan upheaval - BBC News". BBC News (بالإنجليزية البريطانية). Archived from the original on 2018-06-12. Retrieved 2016-04-20.

Highfield، Roger؛ Robert Uhlig and David Derbyshire (9 سبتمبر 2000). "Comet caused Dark Ages, says tree ring expert". Daily Telegraph. مؤرشف من الأصل في 2018-07-15. اطلع عليه بتاريخ 2011-11-06.

"El Chichon eruption implicated in Mayan upheaval - BBC News". BBC News (بالإنجليزية البريطانية). Archived from the original on 2018-06-12. Retrieved 2016-04-20.
"In 1986 I discovered that a series of Irish oaks exhibited their narrowest rings in the immediate vicinity of." مؤرشف من الأصل في 2016-03-03.
Highfield، Roger؛ Robert Uhlig and David Derbyshire (9 سبتمبر 2000). "Comet caused Dark Ages, says tree ring expert". Daily Telegraph. مؤرشف من الأصل في 2018-07-15. اطلع عليه بتاريخ 2011-11-06.