VAS, G. (2006). GEOTHERMAL ENERGY THE EARTH'S INNER POWER. RISING SUN.
Chicagoスタイル(17版)引用形式VAS, GRATIAN. GEOTHERMAL ENERGY THE EARTH'S INNER POWER. UK: RISING SUN, 2006.
MLA(9版)引用形式VAS, GRATIAN. GEOTHERMAL ENERGY THE EARTH'S INNER POWER. RISING SUN, 2006.
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