David Dunlap Observatory
David Dunlap Observatory records, 1921-1970.
Correspondence files of the Director of the David Dunlap Observatory arranged by authors and subjects (1932-1970), subject files (1950-1964) and one photograph (1956).
David Dunlup Observatory -- Administration.
Observatories -- Canada.
Photographs. aat aat
AIP-ICOS
University of Toronto. University Archives. 120 St. George St., Toronto, Ontario M5S 1A5, Canada