BIBLIOGRAFIA

·         Enciclopedia Microsoft® Encarta® 99. © 1993-1998 Microsoft Corporation.

·         Earths Dynamic Systems Eighth Edition. W. Kenneth Hamblin, Eric H. Christiansen.

·         Understanding Earth Second Edition. Frank Press Raymond Siever.

·         Earth an introduction to physical geology sixth edition. Tarbuck and Lutgens.

INDICE

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Nicolas Serna Machado