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Скачать Scientific American September 2009 бесплатно

Scientific American September 2009
PDF | English | 21MB

Scientific American (informally abbreviated to SciAm) is a popular science magazine published since August 28, 1845, which according to the magazine makes it the oldest continuously published magazine in the United States.[1] It brings articles about new and innovative research to the amateur and lay audience.
Scientific American had a worldwide monthly circulation of roughly 733,000 as of December 2008, including newsstand sales of over 100,000[2] It is not a refereed scientific journal, such as Nature; rather, it is a forum where scientific theories and discoveries are explained to a broader audience.

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