Riding, 1987a
From dinoflaj3
Riding, J.B., 1987a: Dinoflagellate cyst stratigraphy of the Nettleton Bottom Borehole (Jurassic: Hettangian to Kimmeridgian), Lincolnshire, England. Proceedings of the Yorkshire Geological Society, v.46, pt.3, p.231-266.