id	domain	url
crln-9004	crl.acrl.org	http://crl.acrl.org/content/early/2013/06/28/crl13-483.full.pdf
crln-9004	books.google.com	http://books.google.com/ngrams
crln-9004	pewinternet.com	http://pewinternet.com/reports/2013/teachers
crln-9004	www.eurofound.europa.eu	www.eurofound.europa.eu
crln-9004	researchanalytics.thomsonreuters.com	http://researchanalytics.thomsonreuters.com/m/pdfs/1003903-1.pdf