Princeton University Library Catalog
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Subject: Topic
- Middle West9
- Social change9
- Social conditions6
- Economic conditions5
- History4
- Aerial photography3
- Agriculture3
- Airplanes3
- Community development3
- Description and travel3
- Economic aspects3
- Landscapes3
- Politics and government3
- Regionalism3
- Social aspects3
- Industries2
- Lake States2
- Working class2
- Party affiliation1
- Political culture1