Colonisation 26 Zoonoses 16 Political Science 13 Social Sciences 13 History 6 Colonialism 5 African literature 4 Communicable diseases 4 Imperialism 4 Man 4 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 4 Women in literature 4 Agriculture 3 Disease control 3 Epidemiology 3 Food industry and trade 3 History and criticism 3 Human diseases 3 Kolonie 3 Parasitic Zoonoses 3 Prion, Viral, Bacterial and Fungal Pathogens of Humans, (New March 2000) 3 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 3 Protozoan, Helminth, Mollusc and Arthropod Parasites of Animals, (New March 2000) 3 Public health 3 Virology 3 Aboriginal Australians 2 Agricultural industries 2 Animal Genetics and Breeding, (New March 2000) 2 Animal Husbandry and Production, (New March 2000) 2 Animal Immunology, (New March 2000) 2