Verma, P. S. (1971). A Manual of Practical Zoology: Invertebrates. S. Chand & Company.
Chicago-čujuhus (17. p.)Verma, P. S. A Manual of Practical Zoology: Invertebrates. New Delhi: S. Chand & Company, 1971.
MLA-čujuhus (9. p.)Verma, P. S. A Manual of Practical Zoology: Invertebrates. S. Chand & Company, 1971.
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