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Subjects
- Astronomical observatories.[remove]11
- Astronomy.4
- Astronomy -- Michigan -- Ann Arbor.3
- Laboratories.2
- Women -- Michigan -- Ann Arbor.2
- Women college students -- Michigan -- Ann Arbor.2
- Astronomy -- United States.1
- Bridges.1
- Broadcasting.1
- Celestial bodies.1
- Children.1
- Classrooms -- Michigan -- Ann Arbor.1
- Coal mining.1
- College teachers' spouses -- Michigan -- Ann Arbor.1
- Dancing -- Michigan -- Ann Arbor.1
- Double stars.1
- Dwellings.1
- Eclipses.1
- Engineering.1
- Engineers -- Michigan -- Ann Arbor.1