Helden, Albert Van <br/><br/>
The invention of the telescope 
Albert Van Helden                                           
 - Philadelphia  The American Philosophical Society  1977 
 - 67p. 
<br/><br/><label>ISBN: </label>0-87169-674-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical telescopes<br/>Astronomy and astrophysics thesaurus<br/>Telescopes
<br/><br/><label>Universal Decimal Class. No.: </label>520.2  / HEL