Maa soojad ja külmad perioodid
1. Causes for climate change [WWW]
http://edugreen.teri.res.in/explore/climate/causes.htm (09.03.2012)
2. A blanket around the Earth [WWW] http://climate.nasa.gov/causes/ (09.03.2012)
3. Hardy,J.T. 2003. Climate change: causes, effects, and solutions. John Wiley & Sons,
Inglismaa.
4. Brief inroduction to the history of climate. [WWW]
http://muller.lbl.gov/pages/IceAgeBook/history_of_climate.html (09.03.2012)
5. Merchant, B. 2009. 97% of Climate Scientists Agree: Humans are Causing Global
Warming. http://www.treehugger.com/corporate-responsibility/97-of-climate-
scientists-agree-humans-are-causing-global-warming.html (09.03.2012)
6. Petit, J. R. et al 1999. Climate and atmospheric history of past 400,000 years from the
Vostok ice core, Antarctika. [WWW] http://www.daycreek.com/dc/images/1999.pdf
(09.03.2012)
7. Hoffmann, D. L
annaabi.ee 
