| Howard, C.W., 1908. A list of the ticks of South Africa (Rhipicephalus). Annals of the Transvaal Museum 1 (2) August: 114-134, 4 plates
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| Howard, C.W., 1908. A list of the ticks of South Africa (Amblyomma). Annals of the Transvaal Museum 1 (2) August: 135-147, 2 plates
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| Howard, C.W., 1908. A list of the ticks of South Africa (Dermacentor). Annals of the Transvaal Museum 1 (2) August: 157-159, host list, bibliography, 1 plate
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