Before tha Internet Age when I first began researching the EMM, I ordered films from the Missouri State Archives out of RG (Record Group) 133. For example, for the 68th EMM in Iron, Madison, Wayne, St. Francois, etc. RG 133-457 had the muster rolls by company with some of the officer information duplicated in the 1863, 1865 Missouri Adjutant General Reports. If the film is readable, and this is hit and miss, there can be some good stuff. For instance on the 68th there is a mention that Co. L had only one-half reliable Union men; about 30 men of Co. G were loyal; Lunsford Harding of Co. D was turned over to the Provost for being a rebel etc. There are Service Cards in RG133-158/159 which are duplicated on the Soldiers site for the Missouri State Archives under the prospective regiment number. Seems as though, I contacted the Archives those many years ago and they sent me a list of the reel numbers for the regiments I was researching. When I was researching the 78th EMM I used that source to compile a roster for in the field research. I have found some great stuff on the Provost Marshal film on the State Archives site but it is all by chance. EMM data is very widely scattered and I find documents in the far flung areas to this day. Knowing how to interpret them is the key and not to make a hasty conclusion, is my best advice.