Grimes, D.J. <br/><br/>
Direct-Current Arc And Alternating-Current Spark Emission Spectrographic Field Methods For The Semiquantitative Analysis Of Geologic Materials 

 -  SEGEMAR  1968 
<br/><br/> Geological Survey, Circular 591, Washington 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Espectrografia<br/>Metodos Analiticos