The genera Boophilus, Rhipicephalus, and Haemaphysalis (Ixodidae) of the new world - Cooley, R. A. (Robert Allen), 1873-1968. (Washington, U.S. Govt. print. off., 1946)
U. S. 79th Cong., 2d sess. House. Doc. 603.
"From the Rocky mountain laboratory, Division of infectious diseases, National institute of health."
"References": p. 51-54.
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