Annie J. Cannon <br/><br/>
The Henry Draper Extension 
Annie J. Cannon 
 - Harvard  Harvard College Observatory  1925-1928 
 - 218 p., tab.  photocopy 
 - Annals of Harvard College Observatory  Volume 100 No 1-6  (1925_1928 218 p., photocopy)   .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics--spectra
<br/><br/><label>Subjects--Index Terms: </label>Catalogue 
<br/><br/><label>Dewey Class. No.: </label>B611C12f921