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Essential Atlas of Physical Geography, Parramon's Editorial Team, Barron's Educational Series, 2002
Tectonic Plate Movement
Christopherson, Robert W Geosystems: An Introduction to Physical Geography 4th ed. Prentice-Hall Inc Englewood Cliffs, NJ: 2000.
Victoria, British Columbia
Briggs, David, et al. Fundamentals of Physical Geography. 2nd ed. Toronto: Copp Clark Pitman, Ltd., 1993.
Temperature in Natural Grasslands and Plant Biomass
Fundamental of Physical Geography (nd) Chapter 7: Introduction to the Atmosphere: Atmospheric Composition [Online] located at ;http://www.physicalgeography.n et/fundamental ls/7a.html
The Ozone Layer
Marsh, G.P. Man and Nature: Physical Geography as Modified by Human Action. NY. Scribner, 1864.
“Man and Natureâ€
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