*[http://cookrecorder.com/ Cook County Recorder of Deeds] land records, military discharge DD-214s.
*[http://www.cookcountyil.gov/medical-examiner/ Cook County Medical Examiner] suspicious or unusual deaths.
http://www.ilnd.uscourts.gov /home/ClerksOffice.aspx U.S. District Court Northern District of Illinois] recent civil and criminal court records.
*[[Arlington Heights Memorial Library|Arlington Heights Memorial Library]] a huge collection, with printed genealogies, manuscripts, periodicals, newspapers, special aids, surname folders—a great overall genealogy collection.<ref name="DB39">Dollarhide and Bremer, 39.</ref>
*[http://www.spertus.edu/asher_cja/index.php Asher Library], Chicago, Spertus Institute for Jewish Studies 500,000 books, and films.