http://webapps.rrc.state.tx.us/DP/drillDownQueryAction.do?fromPublicQuery=Y&name=RUSSELL%2BCLEARFORK%2BUNIT&univDocNo=489124004
http://webapps.rrc.state.tx.us/DP/drillDownQueryAction.do?fromPublicQuery=Y&name=RUSSELL%2BCLEARFORK%2BUNIT&univDocNo=489124051