Kasprzak, K. (1977). Remarks on histological structure of some parts of reproductive organs of Paranais simplex Hrabe, 1936 (Oligochaeta, Naididae). Zoologica Poloniae. 26:93-102.
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Kasprzak, K.
1977
Remarks on histological structure of some parts of reproductive organs of Paranais simplex Hrabe, 1936 (Oligochaeta, Naididae)