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Dr. Paul Sanborn fonds
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Ice under Dawson tephra at Gold Bottom (1)
Ice under Dawson tephra at Gold Bottom (1)
Ice under Dawson tephra at Gold Bottom (2)
Ice under Dawson tephra at Gold Bottom (2)
Ice under Dawson tephra at Gold Bottom (3)
Ice under Dawson tephra at Gold Bottom (3)
Ice under Dawson tephra at Gold Bottom (4)
Ice under Dawson tephra at Gold Bottom (4)