id	domain	url
cswr-1900	www.cbpp.org	http://www.cbpp.org/71098fs.htm
cswr-1900	www.ceip.org	http://www.ceip.org/files/projects/imp/rpm/rpmvol3no1.pdf
cswr-1900	www.brookings.edu	http://www.brookings.edu
cswr-1900	www.urban.org	http://www.urban.org/url
cswr-1900	www.cbpp.org	http://www.cbpp.org/1-7-00imm.htm
cswr-1900	www.ncsl.org	http://www.ncsl.org/programs
cswr-1900	www.heritage.org	http://www.heritage.org/research
cswr-1900	www.heritage.org	http://www.heritage.org/research
cswr-1900	www.urban.org	http://www.urban.org/url.cfm?id=309007