Gratzer, George A. <br/><br/>
Train your brain :  a year’s worth of puzzles / 
George Gratzer ; translated by Tom Artin 
 - Boca Raton, FL :  CRC Press,  c2011 
 - xviii, 235 p. :  ill. ;  23 cm. 
<br/><br/> Translated from the German 
<br/><br/><label>ISBN: </label>9781568817101 156881710X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Word games<br/>Word problems (Mathematics)