id	domain	url
crln-8858	arxiv.org	http://arxiv.org/pdf/1209.3026v1
crln-8858	www.oclc.org	www.oclc.org/content/emailcontent/en/abstracts/abstracts-100812
crln-8858	freegovinfo.info	http://freegovinfo.info/best
crln-8858	nces.ed.gov	http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2012156rev
crln-8858	pewinternet.org	http://pewinternet.org/reports/2012/smartphone-update-sept-2012.aspx