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01534cam a2200361 a 4500 001 9872F2242B0F11DEAA7E7608A8D7520A 005 200904170021.0 008 020708s2002 couab b f000 0 eng c 010 $a 2002435619 035 $a (OCoLC)50131879 040 $a GIS $c GIS $d SILO $d DLC $d AGL $d GPO $d IWA $d SILO 050 00 $a GB701 W375 02-4038 074 $a 0624-B 074 $a 0624-B (online) 086 0 $a I 19.42/4:02-4038 100 1 $a Chafin, Daniel T. 245 1 $a Evaluation of trends in pH in the Yampa River, northwestern Colorado, 1950-2000 / $c by Daniel T. Chafin. 260 $a Denver, Colo. : $b Information Services [distributor], $b Information Services [distributor], $c 2002. 300 $a iv, 41 p. : $b ill., maps ; $c 28 cm. 440 0 $a Water-resources investigations report ; $v 02-4038 500 $a Shipping list no.: 2002-0255-P. 504 $a Includes bibliographical references (p. 37-38). 530 $a Also available via Internet at the USGS web site. Address as of 01/31/04: http://water.usgs.gov/pubs/wri/wri02-4038/pdf/wri02-4038.pdf; current access available via PURL. 650 0 $a Water quality $z Yampa River. $z Yampa River. 650 0 $a Acidity function. 650 0 $a Hydrogen-ion concentration $x Measurement. 710 2 $a Geological Survey (U.S.) 856 41 $u http://purl.access.gpo.gov/GPO/LPS41911 939 $a 5810390 941 $a 1 952 $l USUX851 $d 20180703062616.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=9872F2242B0F11DEAA7E7608A8D7520A 994 $a 02 $b IWAInitiate Another SILO Locator Search