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| Associated Market Research | 218-722-8600 | 301 W 1st St | Duluth | MN | 55802 |
| Becker County Historical Society | 218-847-2938 | 714 Summit Ave | Detroit Lakes | MN | 56501 |
| Bryles Research | 218-722-9274 | 1600 Miller Trunk Hwy | Duluth | MN | 55811 |
| Er & Rs | 218-354-2305 | 302-324 3 St | Barnesville | MN | 56514 |
| Minnesota Cold Weather Resource Center | 218-283-4942 | 405 3rd St | International Falls | MN | 56649 |