1. Rickettsioses: A continuing disease problem;Bulletin World Health Organ,1982
2. Rickettsioses of the spotted fever group around the world;Walker;J Dermatol,1989
3. Resurgence of Mediterranean spotted fever (letter);Otero;Lancet,1982
4. Boutonneuse fever in American travelers;Harris;J Infect Dis,1986
5. Imported South African tick typhus;Barrett-Connor;West J Med,1983