The Disciples of Christ Historical Society website provides a state by state inventory of microfilmed church records as well as an online catalog of books and archival materials.
By going to the website and clicking on “Congregational Material on Microfilm,” http://www.discipleshistory.org/catalog/default.htm, you can then choose from a pull down menu the locality you are interested in. The records cover the United States, Canada, and England. The site has a research request form where you can learn more about research services and prices, http://www.discipleshistory.org/catalog/default.htm.
Their online catalog of books, pamphlets, photographs and other materials can also be searched from their website at http://www.discipleshistory.org/catalog/alex.htm. The home page for the online catalog even features some search tips.