TY  - BOOK
AU  - Hagen, Gretchen L
TI  - An Atlas of open cluster colour-magnitude diagrams
T2  - Publications of the David Dunlop Observatory, University of Toronto; v. 4
PY  - 1970///
CY  - Toronto
PB  - David Dunlop Observatory
KW  - Atlas
KW  - Open clusters atlas
N1  - Complimentary gift
ER  -