Environmental systems research institute, inc.  <br/><br/>
Arc/Info Sml   simple macro language 

 - Enviornmental systems research institute, inc.  New york  1990 
 -  fig. 
<br/><br/><label>Nat. Bib. No.: </label>6902 
<br/><br/><label>Subjects--Index Terms: </label>Combinations assignable 
<br/><br/><label>Universal Decimal Class. No.: </label>528.923  / ARC