The Congo's growing petroleum sector is by far the country's major revenue earner.

Consequently, the marginal tax rate on the excess return within the petroleum sector is 78%.

What's new are the changes in politics, technology and markets in the petroleum sector.

Therefore, though the petroleum sector is important, it remains in fact a small part of the country's overall vibrant and diversified economy.

He became an electrician in the petroleum sector by profession.

The petroleum sector followed in second place with 28 percent of the overall value, consisting of oil and gas.

The petroleum sector in Egypt consists of 6 state-owned entities.

The integration of the nationalized petroleum sector into Mexico's economy between 1938 and 1940 proved this point to all those involved.

After the war, he guided the petroleum sector of the Marshall Plan.

Current revenue from the petroleum sector is estimated to be at its peak period and to decline over the next decades.