Blecha . Milo K  Gega . Peter C  Green Muriel <br/><br/>
Expoloring Science Gold Book 

 - New York   Laidlaw Brothers   1976 
 - 192 p. 
<br/><br/><label>ISBN: </label>0-8445-5522-3 
<br/><br/><label>Dewey Class. No.: </label>500  / BLE