| Business | Phone |
| Amir Oil Co 4740 Ingersoll St 215, Houston 77027 | (713) 629-0465 |
| Douglas C Koch-Nantuck Resourc 723 Main St, Houston 77002 | (713) 227-5204 |
| L L & E Royalty Trust 712 Main St, Houston 77002 | (713) 216-5447 |
| Douglas C Koch-Nantuck Resourc 2211 Norfolk St, Houston 77098 | (713) 526-6021 |