| Petroleum engineering -- Texas -- History. Matches 1 item |
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Petroleum exploration. SEE: Petroleum -- Prospecting Matches 1 item
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Petroleum exploration -- Middle East -- History. SEE: Petroleum -- Prospecting -- Middle East -- History. Matches 2 items
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Petroleum geology. SEE: Petroleum -- Geology Matches 1 item
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Petroleum -- Geology. Matches 1 item See Also: Deep-earth gas theory. Matches 1 item
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| Petroleum -- History. Matches 2 items |
| Petroleum -- History -- 19th century. Matches 1 item |
| Petroleum -- History -- 20th century. Matches 1 item |
| Petroleum -- History -- 21st century. Matches 1 item |
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Petroleum industry and trade. Matches 6 items See Also: Oil industries. Matches 1 item
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