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@Article{Sognnaes:1953:SYT, author = "Reidar F. Sognnaes", title = "The Skin of your Teeth", journal = j-SCI-AMER, volume = "188", number = "6", pages = "38--42", month = jun, year = "1953", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican0653-38", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Sat May 18 15:57:56 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam1950.bib", URL = "http://www.nature.com/scientificamerican/journal/v188/n6/pdf/scientificamerican0653-38.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", }