Cloud, P. (1979). Earth science and earth resources—A centenary salute to the U.S. Geological Survey: Introduction to the symposium.
シカゴスタイル引用形Cloud, Preston. Earth Science and Earth Resources—A Centenary Salute to the U.S. Geological Survey: Introduction to the Symposium. 1979.
MLA引用形式Cloud, Preston. Earth Science and Earth Resources—A Centenary Salute to the U.S. Geological Survey: Introduction to the Symposium. 1979.
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