Early blue glass beads in Illinois vs those beads found in northern Alaska | |||||
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"Four dates from four features are associated with the protohistoric component and these have corrected one-sigma spans that range from AD 1490 to AD 1663 (Table 1), providing the likely time frame for the glass bead assemblage."
https://www.academia.edu/22984663/Seventeenth_Century_Glass_Beads_from_the_New_Lenox_Site_in_Will_County_Illinois
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