01801nam a2200337Ia 4500001000700000003000600007005001700013007001400030008004100044010001700085040001300102043001200115074001400127074001900141086002600160100003000186245032400216260016000540300004300700500003600743504005200779530019100831533008901022650005401111650005601165650005101221710006001272710003801332830004901370856004401419270414OCoLC20200624062627.0he bmb024bbca041006s2004    vauab   bb   f000 0 eng d  a  2004398103  aJJGcJJG  an-us-co  a0624-B-02  a0624-B-02 (MF)0 aI 19.42/4-4:2004-50241 aOrtiz, Roderick F.2Local10aMethods to identify changes in background water-quality conditions using dissolved-solids concentrations and loads as indicators, Arkansas River and Fountain Creek, in the vicinity of Pueblo, Coloradoh[microform]cby Roderick F. Ortiz ; prepared in cooperation with the Southeastern Colorado Water Activity Enterprise.  aReston, Vir.bU.S. Dept. of the Interior, U.S. Geological SurveyaDenver, Col.bU.S. Geological Survey, Branch of Information Services [distributor]c2004.  aiv, 20 p.bcol. ill., col. mapc28 cm.  aShipping list no.: 2004-0508-M.  aIncludes bibliographical references (p. 19-20).  aAlso available online via the Internet from the USGS Web site. Address as of 07/13/2004: http://water.usgs.gov/pubs/sir/2004/5024/pdf/SIR-5024comp.pdf; current access available via PURL.  aMicrofiche.b[Washington, D.C.]cSupt. Docs./G.P.O.d2004.e1 microfiche : negative. 0aWaterxPollutionzColoradozPueblo Region.2Local 0aIndicators BiologyzColoradozPueblo Region.2Local 0aWater qualityzColoradozPueblo Region.2Local2 aSoutheastern Colorado Water Activity Enterprise.2Local  aGeological Survey (U.S.)  2Local 0aScientific investigations reportv2004-5024.41uhttp://purl.access.gpo.gov/GPO/LPS50159