(1998). Guidelines for application of petroleum reserves definitions (2nd ed.). [Richardson, TX.]: Society of Petroleum Evaluation Engineers.
Παραπομπή Chicago StyleGuidelines for Application of Petroleum Reserves Definitions. 2nd ed. [Richardson, TX.]: Society of Petroleum Evaluation Engineers, 1998.
Παραπομπή MLAGuidelines for Application of Petroleum Reserves Definitions. 2nd ed. [Richardson, TX.]: Society of Petroleum Evaluation Engineers, 1998.
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