Riahi, nassim, , , Adabi, Mohammad Hossein, , . 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. 2021;15(57):123-141. doi: