Nair, K. N., Das, A. K. and Das, R. N. (1967) “On Some Freshwater Rhizopoda and Heliozoa (Protozoa) from Calcutta and its Environs Part I”, Records of the Zoological Survey of India, 65(1-4), pp. 1–16. doi: 10.26515/rzsi/v65/i1-4/1967/161515.