EntityQ1585842· pop 16· linked from 92 articlesHarold HammSign in to saveAmerican businessmanConnectionsBakken formationEntityBarack ObamaPersonDonald TrumpPersonOklahomaEntityCatholic ChurchEntityInternational Standard Book NumberEntitynuclear weaponEntityOklahoma CityEntityOPECConceptRepublican Party (United States)ConceptWhite HouseConceptrenewable energyEntityBismarckEntityCNNEntityWayback MachineEntityForbesEntityInternational Standard Serial NumberEntityMitt RomneyEntityTimeEntityReutersEntityCategories1945 births21st-century American philanthropistsAmerican billionairesBusinesspeople from Enid, OklahomaBusinesspeople from Oklahoma CityLiving peopleOklahoma RepublicansPeople from Lexington, Oklahoma