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- Geographic Subject: Indiana18
- Topical Subject: SYMAP (Computer program language)[remove]18
- Topical Subject: Population geography3
- Topical Subject: Agricultural resources2
- Topical Subject: Atmospheric temperature2
- Topical Subject: Historical geography2
- Topical Subject: Phytogeography2
- Topical Subject: Cattle--Geographical distribution1
- Topical Subject: City dwellers1
- Topical Subject: Corn--Geographical distribution1
- Topical Subject: Farm tractors1
- Topical Subject: Farms1
- Topical Subject: Lambs--Geographical distribution1
- Topical Subject: Land capability for agriculture1
- Topical Subject: Oats--Geographical distribution1
- Topical Subject: Pastures1
- Topical Subject: Population density1
- Topical Subject: Rain and rainfall1
- Topical Subject: Sheep--Geographical distribution1
- Topical Subject: Snow1