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• 1. [Image] PH037_AG00090; 14125; P1522

  	[Caterpillar tractor pulling plow and harrow in field, Gilliam County, OR. Two men standing on plow.]; default
  	Citation × Citation Citation Abstract Copy Title: PH037_AG00090; 14125; P1522 Year: 1880 [Caterpillar tractor pulling plow and harrow in field, Gilliam County, OR. Two men standing on plow.]; default Title: PH037_AG00090; 14125; P1522 Year: 1880 [Caterpillar tractor pulling plow and harrow in field, Gilliam County, OR. Two men standing on plow.]; default Close

• 2. [Image] PH037_AG00366; 15069; P1627

  	[Four men on harvester driven by Caterpillar tractor on Meyer farm near Echo, Or.]; default
  	Citation × Citation Citation Abstract Copy Title: PH037_AG00366; 15069; P1627 Year: 1880 [Four men on harvester driven by Caterpillar tractor on Meyer farm near Echo, Or.]; default Title: PH037_AG00366; 15069; P1627 Year: 1880 [Four men on harvester driven by Caterpillar tractor on Meyer farm near Echo, Or.]; default Close