References
- Ransom , B. H. 1910 . The Nematodes parasitic in the Alimentary Tract of Cattle, Sheep, and other Ruminants . U.S. Dept. Agric., Bur. Anim. Ind. Bull ,
- Ransom , B. H. 1911 . Two new Species of Parasitic Nematodes . Proc. U.S. Nat. Mus. , lxi no. 1864, Oct. 31, 1911(1912).