Ortiz, Roderick F. <br/><br/>
Methods 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, Colorado  [microform] 
by Roderick F. Ortiz ; prepared in cooperation with the Southeastern Colorado Water Activity Enterprise. 
 - Reston, Vir.  Denver, Col.  U.S. Dept. of the Interior, U.S. Geological Survey  U.S. Geological Survey, Branch of Information Services [distributor]  2004. 
 - iv, 20 p.  col. ill., col. map  28 cm. 
 - Scientific investigations report  2004-5024. .
<br/><br/> Shipping list no.: 2004-0508-M. 
<br/><br/>Includes bibliographical references (p. 19-20). 
<br/><br/>
<br/><br/><br/>Microfiche. <br/>[Washington, D.C.] <br/>Supt. Docs./G.P.O. <br/>2004. <br/>1 microfiche : negative. 
<br/><br/><label>LCCN: </label>2004398103 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution--Colorado--Pueblo Region.<br/>Indicators Biology--Colorado--Pueblo Region.<br/>Water quality--Colorado--Pueblo Region.
<br/><br/><label>GPO Item No.: </label>0624-B-02 0624-B-02 (MF) 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.42/4-4:2004-5024