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Subjects
- Agriculture.1
- Bird watching.1
- Birds.1
- Botany -- Philippines.1
- Classrooms -- Michigan -- Ann Arbor.1
- Construction industry.1
- Forests and forestry -- Philippines.1
- Herpetology.1
- Holography -- Research.1
- Inventors.1
- Labor movement -- United States -- History -- 19th century.1
- Laboratories -- Michigan.1
- Nematodes.1
- Parades.1
- Photograph albums.1
- Physics.1
- Plant diseases.1
- Professors.1
- Proximity fuzes.1
- Research -- Michigan -- Ann Arbor.1