Riahi, nassim, , , Adabi, Mohammad Hossein, ,  (2021) ‘Biostratigraphy of the Tirgan Formation in Robat-Eshgh (south-west of Bojnurd) and Ghezelghan (North of Bojnurd) stratigraphic sections, and comparing them with each other.’, Iranian Journal of Geology, 15(57), pp. 123-141. doi: