Original source: Nacogdoches Archives Records. Microfilm Publication NAC-1 to NAC-28, 28 rolls. Record Group 004. Austin, Texas: Texas State Archives, 1982-2008. Ancestry.com has searchable indexes; database results and some digitized images are available with a fee-based subscription. Free articles and helpful research materials.
Free WIKI style website that is organizing all the IGI's batch numbers for the entire country of Mexico by state, town and year. Bilingual site also explains how to use batch numbers more effectively in searches.