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1927年7月1日

1分鐘閱讀

山姆大叔，揮霍者——XI

未能開發和深化我們的湖泊和河流系統導致巨大的經濟損失

作者：J. Bernard Walker

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This article was originally published with the title “Uncle Sam, Spendthrift--XI” in 大眾科學 Magazine Vol. 137 No. 1 (July 1927), p. 55
doi:10.1038/scientificamerican0727-55

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