Walther, J. V. (2009). Essentials of geochemistry (2nd ed.). Jones & Bartlett Publishers.
Lua i Stíl Chicago (17ú heag.)Walther, John V. Essentials of Geochemistry. 2nd ed. Sudbury, Mass: Jones & Bartlett Publishers, 2009.
Lua MLA (8ú heag.)Walther, John V. Essentials of Geochemistry. 2nd ed. Jones & Bartlett Publishers, 2009.
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