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Not for SALE in the United States

  1. Aug 28, 2012 #1
    so all my american books have that label (i live in Europe) what content could possible be different between these two versions, i know you use the metric system for science just like us...is it that you keep all the juicy secrets in the us version??
  2. jcsd
  3. Aug 28, 2012 #2


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    Gold Member

    The difference is probably in licensing regulations, one confroms to US licensing regulations while the other (european version) might not need to.

    This same topic was brought up in 2008 as well: https://www.physicsforums.com/archive/index.php/t-249155.html

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