Punnett R (1906) The Enteropneusta. In: Gardiner J, editor. The Fauna and Geography of the Maldive and Laccadive Archipelagos. London: Cambridge University Press. pp. 641-680.
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Punnett, R.
1906
The Enteropneusta
The Fauna and Geography of the Maldive and Laccadive Archipelagos