Annual Report of the Archaeological Survey of India Vol 18, Report of a Tour in the Gorakhpur District in 1875-76 and 1876-77
A. C. L. Carlleyle
1883
<a rel="nofollow" class="external free" href="https://ignca.gov.in/Asi_data/85064.pdf">https://ignca.gov.in/Asi_data/85064.pdf</a>