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2. A new genus of Nematodes, parasitic in the pika
3. Another New Genus of Nematodes, Parasitic in the Pika
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5. S. A. Akhtar, 1958 .On the nematodes (Family: Oxyuridae Cobb., Subfamily Labiostominae n. subf.) parasitic in the pika of Alaska Part II., Pakistan Journal of Scientific Research, 10 :56 –62 .