Não informado. (2000). SPE Drilling & Completion. Society of Petroleum Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. SPE Drilling & Completion. Richardson, Tex: Society of Petroleum Engineers, 2000.
Lua MLA (8ú heag.)Não informado. SPE Drilling & Completion. Society of Petroleum Engineers, 2000.
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