2004. FIRST DISCOVERY OF MIDDLE TOURNAISIAN CONODONTS IN THE GRIOTTE-TYPE NODULAR PELAGIC LIMESTONES, ISTANBUL AREA, NW TURKEY. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA . 110, 2 (Jul. 2004). DOI:https://doi.org/10.13130/2039-4942/5815.