National Archives and Records Administration
- Information on how to purchase or rent microfilm publications from NARA.
- http://www.archives.gov/research/order/

Heritage Quest Genealogy Microfilm
- Offers over 250,000 microfilm titles for purchase or rental, including the entire U.S. Federal Census. Also will produce digital microfilm for computer use.
- http://www.HeritageQuest.com/genealogy/microfilm

Federal Census Records for New York State
- Information on what's available for rental at the State Library in Albany.
- http://www.nysl.nysed.gov/genealogy/fedcen.htm