| Business | Phone |
| Keith Walker Oil & Gas 301 W Boyd St, Norman 73069 | (405) 701-0676 |
| Monroe Natural Gas 501 Okmulgee St, Norman 73071 | (405) 321-5647 |
| Mc Queen Oil Properties 210 N University Blvd, Norman 73069 | (405) 321-4672 |
| M E Klein & Assoc 3750 W Main St # Aa, Norman 73072 | (405) 321-7171 |