You will see a list of the Counties with the Microfilm #'s that can be found at the National Archives. The following index is listed by Last name, first name, then the county.
Microfim # 72, M19 includes the following counties: LINCOLN, MARION, CHARITON, WASHINGTON, JEFFERSON, FRANKLIN, GASCONADE, CRAWFORD, COLE, MONTGOMERY, PIKE, ST.CHARLES, ST. LOUIS, STE. GENEVIEVE, PERRY, ST. FRANCOIS, and CAPE Counties.
Microfilm # 73, M19 includes the following counties: SCOTT, NEW MADRID, WAYNE, CALLAWAY, BOONE, HOWARD, COOPER, SALINE, LAYAYETTE, CLAY, JACKSON, RANDOLPH, MADISON, RALLS, and RAY Counties.