Wilson, Herbert C. and Gingrich, Curvin H. <br/><br/>
Popular Astronomy 
Volume XXIII 
 - Minnesota  Goodsell Observatory of Carleton College  1915 
 - 700 
<br/><br/><label>Subjects--Personal Names: </label> Astronomy 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy