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API
Provides industry sectors, gasoline, natural gas, use energy wisely, diesel, oil sands, engine oil, heating oil, energy tomorrow, alternative fuels, use energy safely, facts on fuel.
Independent Petroleum Association of America
Provides independent oil and natural gas producers for three-quarters of a century.
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202-682-8000 
1220 L Street, NW, Washington D.C, 20005-4070
