id	domain	url
abr-94	www.census.gov	http://www.census.gov/compendia/statab/cats/population/elderly_racial_and_hispanic_
abr-94	trid.trb.org	http://trid.trb.org/view.aspx?id=577321
abr-94	citeseerx.ist.psu.edu	http://citeseerx.ist.psu.edu/viewdoc/summary?doi