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William L. Leffler

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Petroleum Refining Chart
Petroleum Refining for the Non-Technical Person
Petroleum refining in nontechnical language
2013 Petrochemicals Chart
Deepwater Petroleum Exploration & Production: A Nontechnical Guide
Deepwater Petroleum Exploration & Production A Nontechnical Guide
Natural Gas Liquids A Nontechnical Guide
Oil and Gas Production in Nontechnical Language
Petroleum Refining in Nontechnical Language
Oil and Gas Pipelines in Nontechnical Language
Natural Gas Liquids