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<http://online.wsj.com/articles/backing-out-the-backlog-in-solarcitys-valuation-heard-on-the-street-1403467371>
<http://www.wsj.com/articles/backing-out-the-backlog-in-solarcitys-valuation-heard-on-the-street-1403467371?mod=Markets_newsreel_2>