(1999). SPE/EPA exploration and production environmental conference: Proceedings 1-3 March 1999, Austin, Texas. Richardson, TX.: Society of Petroleum Engineers.
Παραπομπή Chicago StyleSPE/EPA Exploration and Production Environmental Conference: Proceedings 1-3 March 1999, Austin, Texas. Richardson, TX.: Society of Petroleum Engineers, 1999.
Παραπομπή MLASPE/EPA Exploration and Production Environmental Conference: Proceedings 1-3 March 1999, Austin, Texas. Richardson, TX.: Society of Petroleum Engineers, 1999.
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