Williams J. C., Kakoma I. & Ristic M. (1990). Ehrlichiosis. London: Kluwer.
Williams Jim C, Kakoma Ibulaimu and Ristic Miodrag. 1990. Ehrlichiosis. London: Kluwer.
Williams J. C., Kakoma I. and Ristic M. (1990). Ehrlichiosis. London: Kluwer.
Williams Jim C, Kakoma Ibulaimu and Ristic Miodrag. Ehrlichiosis. London: Kluwer. 1990.