Brecher,ErwinGerrard, Mike <br/><br/>
Challenging science puzzles 

 -  Goodwill Pub, N.Delhi  2000 
 - 93 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science Puzzles
<br/><br/><label>Dewey Class. No.: </label>793.73  BRE `R'