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Mahadevan, S and Nayar, K Nagappan (1972) Free diving in Indian waters. Seafood Export Journal, 4 (2). pp. 25-27.
Mahadevan, S and Nayar, K Nagappan (1966) Underwater ecological observations in the Gulf of Mannar off Tuticorin-VI. On The Habitat, Movements and Breeding Habits of the Chank, Xancus pyrum (Linnaeus). Journal of the Marine Biological Association of India, 8 (1). pp. 213-217.
Mahadevan, S and Nayar, K Nagappan (1965) Underwater ecological observations in the Gulf of Mannar, off Tuticorin-I. Association between a Fish {Gnathanodon) and a Sea-Snake. Journal of the Marine Biological Association of India, 7 (1). pp. 197-198.
Nayar, K Nagappan and Mahadevan, S (1964) Underwater ecological observations in the Gulf of Mannar, off Tuticorin-II. The Occurrence of the Synaptid Chondrocloea along with the Massive Sponge, Petrosia. Journal of the Marine Biological Association of India, 7 (1). pp. 199-200.
Victor, A C C and Chellam, A and Ramadoss, K (1989) Underwater observations in the lagoons. CMFRI Bulletin Marine living resources of the union territory of Lakshadweep An Indicative Survey With Suggestions For Development, 43. pp. 227-242.