Hagen, Gretchen L <br/><br/>
An Atlas of open cluster colour-magnitude diagrams 
Gretchen L. Hagen 
 - Toronto  David Dunlop Observatory  1970 
 - 62p. 
 - Publications of the David Dunlop Observatory, University of Toronto; v. 4 .
<br/><br/> Complimentary gift 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atlas<br/>Open clusters atlas
<br/><br/><label>Universal Decimal Class. No.: </label>084.4:52  / HAG