Mastering Map Work (KCSE) 
Wilfred  Williams.  
 - 3rd edition . 
 - Nairobi  :  Longhorn Publishers  ;  2006 . 
 - vi ,127 p . ;  col.illustrations .  18 cm . 
<br/><br/><label>ISBN: </label>9966494510 
<br/><br/><label>Dewey Class. No.: </label>912