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AccessScience ISSN: 1097-8542.

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Biographies, quotations appearing on Topic pages, and Historical Reviews in the fields of Astronomy, Biology, Chemistry, Geology, Engineering and Technology, Mathematics, and Physics are published under license © RM, 2007. All rights reserved. Helicon Publishing is a division of RM. Certain descriptions of World Wide Web sites included in "Related Sites" are published under license from Helicon Publishing Ltd.

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