The West Sioux Classis Archives document the corporate institutional life of a regional classis of the Reformed Church in America based in northwest Iowa, southwest Minnesota, southeast South Dakota, and Colorado in the mid and late twentieth century. The records include the minutes of the classis and related material. Collectively, these archives provide evidence for the historical growth of a multi-generational Dutch-immigrant Protestant denomination in the trans-Mississippi prairies and northern plains over fifty-five years.
Anderson, Douglas Firth, "West Sioux Classis" (2015). Finding Aids. 10.