01879oam 2200541I 450 991071178370332120181227112908.0(CKB)5470000002486231(OCoLC)953209327(OCoLC)995470000002486231(EXLCZ)99547000000248623120160707d1977 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierA device for automatic photoelectric control of the analytical gap for emission spectrographs /by John A. Dietrich, Elmo F. Cooley, and Kenneth J. Curry[Reston, Virginia] :United States Department of the Interior, Geological Survey,1977.1 online resource (iii, 5 pages) illustrationsGeological Survey circular ;748Includes bibliographical references (page 5).Emission spectroscopyOptoelectronic devicesSpectrum analysisInstrumentsEmission spectroscopyfastOptoelectronic devicesfastSpectrum analysisInstrumentsfastEmission spectroscopy.Optoelectronic devices.Spectrum analysisInstruments.Emission spectroscopy.Optoelectronic devices.Spectrum analysisInstruments.Dietrich John A.1418016Cooley E. F.Curry Kenneth J.Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910711783703321A device for automatic photoelectric control of the analytical gap for emission spectrographs3528146UNINA