Mehrotra and Sinha, 1981
From dinoflaj3
Mehrotra, N.C. and Sinha, A.K., 1981: Further studies on microplankton from the Sangchamalla Formation (Upper Flysch) of Malla Johar area in the Tethyan zone of higher Kumaun Himalaya. In: Sinha, A.K. (editor), Contemporary Geoscientific Researches in Himalaya, v.1, p.151-160; Bishen Singh Mahendra Pal Singh, Dehra Dun, India.