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Belogurov, O. I. and Belogurova, L. S. (1978). Morphology of Oncholaimus paropisthonchus Sp N, Oncholaimus zinus Sp N, Oncholaimium unicum Sp N. and Key for Genera of the Subfamily Oncholaiminae (Nematoda) (Morfologiia Oncholaimus paropisthonchus Sp.N., Oncholaimus zinus Sp N, Oncholaimium unicum Sp N i Tablitsa dlia Opredeleniia Rodov Podsemeistva Oncholaiminae (Nematoda, Oncholaimidae)). Zoologicheskii Zhurnal, 57(7): 977-986.