01809oam 2200517 450 991071142350332120181016104117.0(CKB)5470000002483809(OCoLC)953291079(OCoLC)995470000002483809(EXLCZ)99547000000248380920160708d1961 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierSonic depth sounder for laboratory and field use /by E.V. Richardson, D.B. Simons, and G.J. PosakonyWashington :United States Department of the Interior, Geological Survey,1961.1 online resource (iii, 7 pages) illustrationsGeological Survey circular ;450Includes bibliographical references (page 7).Echo soundingEquipment and suppliesStream measurementsEquipment and suppliesUnderwater acousticsStream measurementsEquipment and suppliesfastUnderwater acousticsfastEcho soundingEquipment and supplies.Stream measurementsEquipment and supplies.Underwater acoustics.Stream measurementsEquipment and supplies.Underwater acoustics.Richardson E. V(Everett V.),1924-1395229Posakony G. J(Gerald J.),1925-Simons Daryl B.Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910711423503321Sonic depth sounder for laboratory and field use3517004UNINA