Kawashima, Ryuta <br/><br/>
Train your brain :  60 days to a better brain / 
Dr Kawashima 
 - London :  Penguin Books,  c2008 
 - xv, 187 p. :  ill. ;  20 cm. 
<br/><br/> Copyright Ryuta Kawashima/Kumon Publishing Co. Ltd, 2005 
<br/><br/><label>ISBN: </label>9780141034881 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental work<br/>Memory--Problems, exercises, etc.<br/>Arithmetic--Problems, exercises, etc.