00785nam a2200169Ia 450000100070000000500170000700800410002404000100006508200270007510000270010224501680012926001410029730000340043850400510047265000440052365000480056725114520160527185935.0011002e2000    xxuab  gr     000 0 eng d  aPUCPR00221a551.480978bM4231e1 aMast, M. Alisa.2Local10aEnvironmental characteristics and water quality of hydrologic benchmark network stations in the western United States, 1963-95cby M. Alisa Mast and David W. Clow.  aReston, Va.bU.S. Dept. of the Interior, U.S. Geological SurveyaDenver, CObFree on application to the USGS Information Servicesc2000.  ax, 114 p.bill., mapsc28 cm.  aIncludes bibliographical references and index. 0aHydrologyzWest (U.S.)xHistory.2Local 0aWater qualityzWest (U.S.)xHistory.2Local