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Subjects
- Geology.2
- Paleontology.2
- Botany.1
- Bridges.1
- Business enterprises -- Michigan -- Ypsilanti.1
- Business records.1
- Camping.1
- Construction industry.1
- Dwellings -- Michigan -- Ann Arbor.1
- Education -- United States.1
- Evolution -- Religious aspects.1
- Farming -- Michigan.1
- Farms.1
- Forests and forestry -- Michigan -- Maps.1
- Fossils.1
- Fraternities and sororities.1
- Geology -- Michigan -- Maps.1
- Geology -- Michigan.1
- Geology -- Minnesota -- Maps.1
- Geology -- United States.1