Dr Anand Shanker Singh (20 نومبر 2017)۔ "The Chronology of Northern Black Polished Ware : Recent Perspectives"۔ International Journal of Scientific Research in Science, Engineering and Technology IJSRST۔ ج 3: 1488-1492: "...The emergent picture is that the beginning of NBPW could safely be pushed to circa 700 BCE, if not earlier (Ayodhya 1003 BCE & Juafardih 1200 BCE) and therefore, the NBPW period ranges from 700 BCE to 50 BCE..."
Michel Danino. "A Timeline of Ayodhya" (بزبان انگریزی): 2-6 (Period I: Northern Black Polished Ware (NBPW) c. 1300 BC - 300 BC Period I: The Human activity at the [Ram Janambhumi - Babri Masjid] dates back to the circa: thirteenth century B.C. on the bases of the scientific dating method providing the only archaeological evidence for such an early dating of the human occupation at the site (Sharma 2011:48). People using Northern Black Polished Ware (NBPW) a pottery type generally associated with the urbanization of the ganges plains were the first occupants of the site at Ayodhya). {{حوالہ رسالہ}}: الاستشهاد بدورية محكمة يطلب |دورية محكمة= (help)
asihyderabadcircle.com
Tewari, Rakesh, (2016). "Excavation at Juafardih, District Nalanda (Bihar)"آرکائیو شدہ(غیرموجود تاریخ) بذریعہ asihyderabadcircle.com (نقص:نامعلوم آرکائیو یو آر ایل), in Indian Archaeology 2006-07 - A Review, Archaeological Survey of India, New Delhi, pp. 6-8: "... Layer 13, the uppermost deposit of Period I, has provided a C14 date of 1354 BCE, it may thus be seen that the C14 dates of Period I and II are consistent and justifiably indicate that the conventional date bracket for NBPW requires a fresh review at least for the sites in Magadh region..."
