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2. Four-year study of WHO virus reports on enteroviruses other than poliovirus;Assaad;Bull. Wld. Hlth. Org.,1972
3. Poliomyelitis in the Cameroons: Virological and serological survey in the infantile population of Yaounde;Boche;Rev. Epidemiol. Med. Soc.,1973
4. Piggy-back microtransfer technique;Catalano;Appl. Microbiol.,1969