1. JH Arundel, and AK Sutherland (1988 ) Ectoparasitic Diseases of Sheep, Cattle , Goats and Horses, Aust Govt Publ Serv, Canberra, Animal Health in Australiavol 10 , p178 .
2. LL Callow (1984 ) Protozoal and Rickettsial Diseases , Aust Govt Publ Serv, Canberra, Animal Health in Australiavol 5 , p264 .
3. Sheep-adapted Anaplasma marginale maintains virulence for cattle