The 3 that I think you are seeing are in red, and therefore undefined. I think you're seeing them here, right?
Missouri TRS- the RR Wiki
The one Dittronics that is there goes back to a Deprecated database entry, so I will move it and modify the article.
Now to your question - I think you are wanting to document this, but it only shows 2 sites
https://www.radioreference.com/apps/db/?sid=9964
In any case, since there is more than one county, use the Multi-County template to build an article for it, and be sure to include the DMR template to put the proper warning on it. The template and some doc for it can be found here...
https://wiki.radioreference.com/index.php/Template:Infobox_TRS_MultiCounty
If you look at the 'What Links Here' in the Toolbox to the left, about 2/3 of the way down, you will see many examples of how to code the template. It requires less than a single county box because there are templates behind the scenes that take over a few of the required functions
If you need further help, please ask and we'll jump in...Mike