Ten Rhyparus from the Western Hemisphere (Coleoptera: Scarabaeidae: Aphodiinae)Smithsonian Institution Press; for sale by the Supt. of Docs., U.S. Govt. Print. Off.20
Cartwright, Oscar Ling and Woodruff, Robert E. 1969. Ten Rhyparus from the Western Hemisphere (Coleoptera: Scarabaeidae: Aphodiinae). Washington: Smithsonian Institution Press; for sale by the Supt. of Docs., U.S. Govt. Print. Off.. In Smithsonian Contributions to Zoology, 21.