Whitehead, H. (1976). An A - Z of offshore oil and gas: :an illustrated international glossary and reference guide tothe offshore oil and gas industries and their technology (Ed.2.). Gulf publishing.

Whitehead, Harry. An A - Z of Offshore Oil and Gas: :an Illustrated International Glossary and Reference Guide Tothe Offshore Oil and Gas Industries and Their Technology. Ed.2. Houston: Gulf publishing, 1976.

Whitehead, Harry. An A - Z of Offshore Oil and Gas: :an Illustrated International Glossary and Reference Guide Tothe Offshore Oil and Gas Industries and Their Technology. Ed.2. Gulf publishing, 1976.