David Dunlap Observatory Logbook, January- November 1972 Book Discussion

David Dunlap Observatory Logbook, January- November 1972 (Volume 44, January- November 1972, Plate Nos. 35716-36769)

David Dunlap Observatory Logbook, January- November 1972 (Volume 44, January- November 1972, Plate Nos. 35716-36769)
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David Dunlap Observatory

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