Edwards, Melvin D. <br/><br/>
Operational guidelines for assistance centers of the national water data exchange 

 - Virginia  U.S. Geological Survey  1980 
 - 38 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operational guidelines for NWDE
<br/><br/><label>Dewey Class. No.: </label>556(083.744) E34O