Encyclopaedia Britannica <br/><br/>
My first Britannica; Vol 2  Physical Sciences and Technology 

 - Chicago  Encyclopaedia Britannica lnc.  2004 
 - 96  Hb 
 - My First Britannica .
<br/><br/> Journey Through Space 
<br/><br/><label>ISBN: </label>978-1-593-39-050-5 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Encyclopaedia<br/>
<br/><br/><label>Dewey Class. No.: </label>R032