LEADER 01551nem 2200409 450 001 9910716550803321 005 20210623133906.0 035 $a(CKB)5470000002522648 035 $a(OCoLC)1257427056 035 $a(EXLCZ)995470000002522648 100 $a20210623d2021 ca 101 0 $aeng 120 $ab|||||||||||| 121 $a||||||||| 124 $bd 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aSurficial geology of the northern San Luis Valley, Saguache, Fremont, Custer, Alamosa, Rio Grande, Conejos, and Costilla Counties, Colorado /$fby Chester A. Ruleman and Theodore R, Brandt 210 1$a[Reston, Va.] :$cU.S. Department of the Interior, U.S. Geological Survey,$d2021. 215 $a1 online resource (3 maps) $ccolor 225 1 $aScientific investigations map ;$v3475 300 $aRelief shown by shading. 300 $aIncludes text, table, 2 cross sections, location map, index map, and ancillary map. 320 $aIncludes bibliographical references. 606 $aGeology$zSan Luis Valley (Colo. and N.M.)$vMaps 608 $aMaps.$2lcgft 615 0$aGeology 702 $aRuleman$b C. A$g(Chester Allan), 702 $aBrandt$b Ted R.$f1954- 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910716550803321 996 $aSurficial geology of the northern San Luis Valley, Saguache, Fremont, Custer, Alamosa, Rio Grande, Conejos, and Costilla Counties, Colorado$93307966 997 $aUNINA