01442oam 2200433Ia 450 991069091720332120040428143149.0(CKB)5470000002343175(OCoLC)45634338ocm45634338(OCoLC)995470000002343175(EXLCZ)99547000000234317520001229d2000 ua 0engurcn||||||txtrdacontentcrdamediacrrdacarrierA simple device for measuring differences in hydraulic head between surface water and shallow ground water[electronic resource][Reston, Va.] :U.S. Dept. of the Interior, U.S. Geological Survey,[2000]USGS fact sheet ;FS-077-00Title from title screen (viewed on Apr. 28, 2004)."June 2000"Includes bibliographical references.Hydraulic measurementsHydraulicsInstrumentsPressure gagesHydraulic measurements.HydraulicsInstruments.Pressure gages.Geological Survey (U.S.)GISGISOCLCQGPOBOOK9910690917203321A simple device for measuring differences in hydraulic head between surface water and shallow ground water3430065UNINA