Conferences
Pacific Oil Conference (POC)
WPMA

Suppliers
BP
Chevron
ConocoPhillips
Tesoro
Shell

Associations
PMAA
American Petroleum Institute
We Card

State Agenices
Oregon DEQ
Oregon Department of Ag, Measurements Standards Division
Oregon Department of Transportation 

Federal Agenices
Environmental Protection Agency
Energy Information Administration
US Department of Transportation

AAA Gas Price Survey