http://www.fcsm.gov/spwptbco.html
Items submitted by Mike Zdeb (email: msz03@health.state.ny.us):
home.iprimus.com.au/agwm (LinkageWiz)
www.burgoyne.com/pages/bdespain/genlink/rlg-toc.htm (Record Linkage in Genealogy)
codes.med.utah.edu/datalinkage/datalinkage.htm