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Top 50 international oil companies (DSA01)

National oil companies  (DSA02)

International oil and gas organisations  (DSA03)

Organisations relevant to the petroleum industry  (DSA05)

Leading UK oil companies  (DSA06)

Law firms relevant to the petroleum industry  (DSA08)

Accountancy firms relevant to the petroleum industry  (DSA09)

Financial institutions relevant to the petroleum industry  (DSA10)

Brokers and traders  (DSA11)

Pricing organisations  (DSA12)

UK refineries  (DSA14)