BUZZ-Oil and gas stocks: Crude slips closer to 6-year low
** Shares of oil and gas companies down 4-12 pct
** Oil prices fall towards 6-year lows on data showing that Japan economy contracted in Q2
** U.S. crude for September was trading 45 cents lower at $42.05/bbl at 1348 GMT, close to lowest in more than 6 years
** Shares of Atlas Resource Partners LP down 11.6 pct, Baytex Energy Corp down 7.3 pct, Jones Energy Inc down 4.9 pct
** Comstock Resources Inc down 3.6 pct, Pacific Drilling SA down 3.3 pct, LRR Energy LP down 4 pct
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