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1926年10月1日

1分鐘閱讀

山姆大叔，揮霍者--V

煤炭的開採、銷售和使用中的浪費，以及補救措施

作者：J. 伯納德·沃克

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More by J. Bernard Walker

This article was originally published with the title “Uncle Sam, Spendthrift--V” in 大眾科學 Magazine Vol. 135 No. 4 (October 1926), p. 270
doi:10.1038/scientificamerican1026-270

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