Cahokia Birdman Tablet found in 1971 at Monks Mound
Cahokia Birdman Tablet found in 1971 at Monks Mound
Cahokia Birdman Tablet found in 1971 at Monks Mound
1–2 minutes
Cahokia Birdman Tablet found in 1971 at Monks Mound
Cahokia Birdman Tablet found in 1971 at Monks Mound
Aculturame 
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