John H. Williams

Apco Oil & Gas International, Inc. operates as an international oil and gas exploration and production company. The company was founded on April 6, 1979 and is headquartered in Tulsa, OK.

Petrolera Entre Lomas SA is a hydrocarbons exploration and exploitation Company. It is engaged in the production of Oil and Gas in Cuenca Neuquina. The company was founded in 1968 and is headquartered in Río Negro, Argentina.

Westwood Corp. designs and manufactures electrical distribution and control equipment. Its products include naval products and services, Westwood paralleling kit, remote start kit, power and signal switchboards which are installed in naval vessels. The company was founded in 1968 and is headquartered in Tulsa, OK.

The Philbrook Museum of Art is a museum located in Tulsa, OK. It is situated in the historic home of Waite and Genevieve Phillips, with extensive formal gardens. The museum is committed to being Tulsa's premier cultural institution, and it houses the H. A. & Mary K. Chapman Library, a reference library.

Willbros Group, Inc. engages in the provision of engineering and construction services to the oil, gas, refinery, petrochemical, and power industries. The company was founded by Miller Williams and David Williams in 1908 and is headquartered in Houston, TX.