Du Plessis, J.L.; Loock, P.J.; Ludemann, C.J.F.; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
Several conclusions of importance to studies on the epidemiology of heartwater were drawn from
an investigation in which the numbers of adult Amblyomma hebraeum ticks, to which a closed herd of
Hereford cattle were exposed ...