Haggett, Peter. Cliff, Andrew D. Frey, Allan. <br/><br/>
Locational Analysis in Human Geography :  Locational Models. 

 - 2nd Ed. 
 - London :  Edward Arnold,  1965. 
 - vo-1(xiv, 605 P.) 
<br/><br/><label>ISBN: </label>0470992085 
<br/><br/><label>Dewey Class. No.: </label>910.14  / HAG