கேள்வி: எரிமலைக் குளிர்காலம் 536 - மேலும் படிக்க பற்றி தகவல் சொல்.
பதில்: * * * * * the New Tools of History|journal=Good Times|date=January 23, 2003 |url=http://globalthink.net/global/dsppaper.cfm?ArticleID=96 |series=GlobalThink.Net Research Papers |archive-url = https://web.archive.org/web/20070927235420/http://globalthink.net/global/dsppaper.cfm?ArticleID=96 |archive-date = 2007-09-27}} * * * David H. Levy (ed.), ''The Scientific American Book of the Cosmos'', , 2000, [http://print.google.com/print?id=1N_UHgSqbEwC&lpg=186&prev=http://print.google.com/print%3Fq%3DMike%2BBaillie%26btnG%3DSearch%2BPrint&pg=186 (Google Print, p. 186)] * * *