Kawashima, Ryuta <br/><br/>
Train your brain more :  60 days to a better brain / 
Ryuta Kawashima 
 - London :  Penguin Books,  c2008 
 - 172 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>0141035501 9780141035505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental discipline