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Oil and gas companies
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Subcategories
This category has the following 6 subcategories, out of 6 total.
Oil and gas companies by country
(124 C)
Oil and gas companies by continent
(6 C)
N
National oil and gas companies
(10 C, 127 P)
Natural gas companies
(4 C, 10 P)
O
Oil companies
(13 C, 5 P)
Oil shale companies
(2 C, 12 P)