character: Inca Empire
topic: Communication Systems
grade: 3
subject: History
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character: Inca Messengers
topic: Role of Runners in Communication
grade: 3
subject: History
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character: Quipu
topic: Inca Method of Record Keeping
grade: 3
subject: History
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character: Incan Roads
topic: Importance for Travel and Communication
grade: 3
subject: History
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