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Puthran, V A (1977) Some important aspects of fishing vessel regulations in India. Souvenir issued on the occasion of the Silver Jubilee Celebrations of the Integrated Fisheries Project, Cochin. pp. 20-34.
Puthran, V A and Pillai, V N (1974) Interpretation of fish shoal indications in the Arabian Sea. Seafood Export Journal, 6 (5). pp. 9-14.