Itams :

ENCO (oil company)

GENERAL PETROLEUM CO., of CALIFORNIA - History in short

HUMBLE Oil - History in short

IMPERIAL OIL- History in short

MAGNOLIA PETROLEUM COMPANY, - History in short

PURE OIL CO., - History in short

STANDARD OIL- History in short

STANDARD OIL of INDIANA - History in short

STANDARD OIL of New Jersey - History in short

STANDARD OIL Company of Venezuela - History in short

STANDARD-VACUUM Oil Company (Stanvac) - History in short

INTERNATIONAL PETROLEUM CO., LTD., London - History in short

TROPICAL OIL CO., Colombia - History in short