Murphy, Christine <br/><br/>
Chain of custody. Recomendations for acceptance and analysis of evidentiary geochemical samples. 

<br/><br/><label>Standard No.: </label>U.S.Geological Survey Circular 1138 
<br/><br/><label>Subjects--Index Terms: </label>GEOLOGIA 
<br/><br/><label>Universal Decimal Class. No.: </label>551.4