NBPWNorthern Black Polished Ware (archaeology)
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George Erdosy (1995: 100-105) in his assessment of all radiocarbon dates places the early NBPW at 550-400 B.
The discovery of NBPW in the site is the third of its kind according to the archaeological documents," he said, adding that it was found at Mohasthan Garh first and at Wari Bateshwar in Narsingdi second.