Nikoli <br/><br/>
Heyawake & Sudoku 
Nikoli 
 - New Delhi  Sterling Publishing  2008 
 - 159 p. ; spiral 
<br/><br/><label>ISBN: </label>9781402757495 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sudoku
<br/><br/><label>Dewey Class. No.: </label>793 NIK