Pitt, Valerie <br/><br/>
The Hamlyn junior science encyclopaedia 

 - London  Hamlyn  1973 
 - 256p   
<br/><br/><label>ISBN: </label>060039512X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SCIENCE
<br/><br/><label>Dewey Class. No.: </label>503  / HAM