Gray, J. E. (2003). Geologic Studies of mercury by the U.S. Geological Survey. US Geological Survey circular 1248.
シカゴスタイル引用形Gray, John E. "Geologic Studies of Mercury By the U.S. Geological Survey." US Geological Survey Circular 1248 2003.
MLA引用形式Gray, John E. "Geologic Studies of Mercury By the U.S. Geological Survey." US Geological Survey Circular 1248 2003.
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