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, 1951 … 23 June 2025
Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-Upon Tyne, 1966 -1967 … 12 June 2025