id	domain	url
hjic-674	www.coalgeology.com	http://www.coalgeology.com/coal-classificationand-analysis-coal-rank-classification-by-heat-value/8603
hjic-674	www.scienceworldjournal.org	www.scienceworldjournal.org/article
hjic-674	www.scirp.org	www.scirp.org/journal/paperdownload.aspx?paperid=20564