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

 - 3rd ed.- 
 - Michigan:  Gale Research Co,  1978 
 - xi,167p.:  29cm. 
 - (Originally issued as V.2 of the Encyclopedia of business information sources.)  Vol.2 .
<br/><br/><label>ISBN: </label>0-8103-0374-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business<br/>Information services
<br/><br/><label>LC Class. No.: </label>REF HF5353.E54 1978