Sedimentary Structures and Textures of Rio Orinoco Channel Sands, Venezuela and Colombia 

 - U.S. Geological Survey  1989 
 - p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water Resources<br/>WATER.<br/>Water-supply
<br/><br/><label>Subjects--Geographic Terms: </label><br/>U.S.A., Colorado.