The census records are available online from Heritage Quest. Check with your local library to see if you can sign up to access these records. It's free.
I forgot to give you Social Security information which is also available online at: Social Security Online Death Indexes http://ssdi.genealogy.rootsweb.com/cgi-bin/ssdi.cgihttp://ssdi.genealogy.rootsweb.com/cgi-bin/ssdi.cgi Name Birth Death Last Residence Last Benefit SSN Issued MARY C LAMM 12 Oct 1907 03 Jul 1997 (V) 78217 (San Antonio, Bexar, TX) (none specified) 454-34-5159 Texas AL LAMM 24 Jun 1907 Apr 1975 78212 (San Antonio, Bexar, TX) (none specified) 449-10-6205 Texas
The death records for Texas are also available online but I don't know where. I use a dataset that I got from http://www.tvrview.comhttp://www.tvrview.com . These records also include birth, marriage and divorce information.
Since you say you are doing history research - what kind?