00538nam a2200169Ia 4500003000900000008004100009040001600050080001800066100002200084245007400106260004400180300000900224490007800233500002300311650001000334650002400344IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a084.4:52bHAG  aHagen, Gretchen L 3aAn Atlas of open cluster colour-magnitude diagramscGretchen L. Hagen  aTorontobDavid Dunlop Observatoryc1970  a62p.  aPublications of the David Dunlop Observatory, University of Toronto; v. 4  aComplimentary gift  aAtlas  aOpen clusters atlas