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By "Horsfall, William Robert, (Born - 1908)"
A synopsis of the mosquitoes of Illinois (Diptera, Culicidae) / by Herbert H. Ross [and] William R. Horsfall.
By: Ross, Herbert Holdsworth, - Horsfall, William Robert,
Publication info: Urbana :State of Illinois, Dept. of Registration and Education, Natural History Survey Division,1965.
Contributed by: University of Illinois Urbana Champaign