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Varma, R Prasanna and Rao, K Krishna (1962) Algal resources of Pamban area. Indian Journal of Fisheries, 9A (1). pp. 205-211.
Varma, R Prasanna (1960) Flora of the pearl beds off Tuticorin. Journal of the Marine Biological Association of India, 2 (2). pp. 221-225.
Varma, R Prasanna (1960) A new genus of the lophothalieae from India. Proceedings of the Indian Academy of Sciences, 52 (2). pp. 49-53.
Varma, R Prasanna (1959) Studies on the succession of marine algae on a fresh substratum in Palk Bay. Proceedings of the Indian Academy of Sciences, 49 (4 B). pp. 245-263.