If that were an official document, when its googled or binged or whatever you use, scam websites would not appear.
The Department of petroleum Engineering was established in 1975 and is the oldest department in the Chemical and Natural Resources Engineering Faculty.
The symbol for Petroleum Resources Corporation in the NYSE is: PEO.
Petroleum is one of Cameroons natural resources because there is an abundance of it.
petroleum
Petroleum is one of Mexico natural resources but not the most important
As of July 2014, the market cap for Petroleum Resources Corporation (PEO) is $809,141,857.64.
Petroleum Oil
Primarily petroleum.
petroleum, hydropower, and other resources of commercial importance.

Rocks ,minerals ,and petroleum
Georgia Department of Natural Resources
They are natural or non-living resources.