් දෙස බැලීමේදී වඩා පැහැදිලිවේ.ආශ්‍රිත[සංස්කරණය]↑ Johnson, D. L.; Ambrose, S. H.; Bassett, T. J.; Bowen, M. L.; Crummey, D. E.; Isaacson, J. S.; Johnson, D. N.; Lamb, P.; Saul, M.; Winter-Nelson, A. E. (1997). "Meanings of Environmental Terms". Journal of Environmental Quality. 26 (3): 581–589. doi:10.2134/jeq1997.00472425002600030002x.↑ Symons, ඩොනල්ඩ් (1979). මානව ලිංගිකත්වයේ පරිණාමය. New York: Oxford University Press. p. 31. ISBN 0-19-502535-0.වැඩිදුර කියවන්න[සංස්කරණය]Adams, Simon (2006). Earth Science: An illustrated guide to science. New York NY 10001: Chelsea House. p. 20. ISBN 0-8160-6164-5. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)CS1 maint: location (link)"Earth's Energy Budget". Oklahoma Climatological Survey. 1996–2004. සම්ප්‍රවේශය 2007-11-17.{{cite web}}:  CS1 maint: date format (link)Oldroyd, David (2006). Earth Cycles: A historical perspective. Westport, Connicticut: Greenwood Press. ISBN 0-313-33229-0.Simison, W. Bria