I am almost intrigued by this topic and would like to learn more. Could you please recommend some book to begin with? I have found many articles and periodical at www.pdfqueen.com/country/... pdf books and periodical search engine, but am not sure if it is all worth reading. Thank you for your advice.
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1. Le mercredi 21 avril 2010 à 17:58, par Tomas
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