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Society_of_Petroleum_Engineers?oldid=1020175851&ns=0
Society_of_Petroleum_Engineers?oldid=1020175851&ns=0
http://en.wikipedia.org/wiki/Society_of_Petroleum_Engineers?oldid=1020175851&ns=0
Society of Petroleum Engineers
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Society_of_Petroleum_Engineers?oldid=1020175851&ns=0
http://en.wikipedia.org/wiki/Society_of_Petroleum_Engineers?oldid=1020175851&ns=0