Worvill, Roy <br/><br/>
How it works : the telescope and microscope 

 - England  Ladybird Books Ltd.  1971 
 - 50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Microscope and microscopy
<br/><br/><label>Dewey Class. No.: </label>502.82 W899h