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Old 09-24-12 | 12:59 PM
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fietsbob
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Joined: Jun 2010
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From: NW,Oregon Coast

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For the in depth answer.. you might read up on the subject..

Buy this book :http://mitpress.mit.edu/catalog/item...=10063&ttype=2


http://www.amazon.com/Bicycling-Scie.../dp/0262731541

Last edited by fietsbob; 09-24-12 at 01:19 PM.
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