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Unnithan, R. V. 1957. On the functional 
morphology of a new fauna of Monogenea 
on fishes from Trivandrum and environs. 
Part I. Axinidae fam. nov. Bull. Cent. Res. 
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— 1961. Ibid. Part III. Heteromicro- 
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1962. Ibid. Part II. The family Opis- 
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1967<2. Ibid. Part IV. Microcotylidae s.s. 
and their repartition in subsidiary taxa. (In 
press.) 
I96lb. Patterns of secondary growth 
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