| Business | Phone |
| Winkelman Consulting 2001 15th Ave S, Fargo 58103 | (701) 237-2283 |
| All America Interviewing Svc 1102 14th St N, Fargo 58102 | (701) 478-0508 |
| All American Interviewing Svc 1424 44th St N, Fargo 58102 | (701) 281-1102 |
| Teleforce Inc 601 28th St Sw, Fargo 58103 | (701) 232-6950 |
| D H Research 1121 Westrac Dr S # 202, Fargo 58103 | (701) 235-2303 |
| North American Research Group 601 28th St Sw, Fargo 58103 | (701) 271-0198 |