Annie J.Cannon <br/><br/>
the Henry Draper Extension 
Annie j.Cannon 
 - Cambridge    Publisher by the Observatory  1926-1936 
 - 226 p.tab. 
 - Annals of the Astronomical Observatory of Harvard College   vol.100 (1925-1936,226 p.tab.) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics--Catalogue--extension
<br/><br/><label>Subjects--Index Terms: </label>Star Catalogue-Extension 
<br/><br/><label>Dewey Class. No.: </label>B611C58f930