DEWDNEY A.k <br/><br/>
The Planiverse : Computer Contact with a Two- Dimensional world 

 - MC Clelland & Stewart  Ontario  1984 
<br/><br/><label>ISBN: </label>9781565842212 
<br/><br/><label>Universal Decimal Class. No.: </label>CSL PG  510.2 DUR-W  685