Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-Upon Tyne, 1918 – 1921 … 10 July 2025
Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-Upon Tyne, 1904 – 1907 … 29 June 2025
Transactions of the Natural History Society of Northumberland, Durham and Newcastle-Upon-Tyne, 1923-1926 … 19 April 2025