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2. Poliomyelitis in Nigeria;Collis;West African Medical Journal,1961
3. Innoculation and poliomyelitis;Bradford Hill;British Medical Journal,1950
4. The relation of prophylactic innoculations to the onset of poliomyelitis;McClosky;Lancet,1950
5. Poliomyelitis in Nigeria—Epidemiological pattern of the Disease in Ibadan children;Familusi;Tropical Paediatrics and Environmental Child Health,1977