Wasserman, Paul <br/><br/>
Encyclopedia of geographic information sources  

 - 3rd ed.  
 - Michigan:   Gale Research Company,   1978 
 - xi, 167p.  
<br/><br/><label>ISBN: </label>0-8103-0374-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social science 
<br/><br/><label>Subjects--Index Terms: </label>Information source  
<br/><br/><label>Universal Decimal Class. No.: </label>D 03(026):91  / L8