Sah et al., 1970
From dinoflaj2
Sah, S.C.D., Kar, R.K. and Singh, R.Y., 1970: Fossil microplankton from the Langpar Formation of Therriaghat, south Shillong Plateau, Assam, India. The Palaeobotanist, v.18, p.143-150, pl.1-2.
