Unwin, David J. <br/><br/>
Computer programming for geographers /  
David J. Unwin and John A. Dawson. 
 - 1ª ed. 
 - London [etc.] :   Longman,   1985. 
 - XII, 252 p. ;   23 cm. 
<br/><br/>Biliografía.- Indices. 
<br/><br/><label>ISBN: </label>0-582-30095-9