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2. On stability of oral polio virus vaccines;Mauler;Dev. Biol. Stand.,1978
3. Production, control and stability of live poliovirus vaccine;Peetermans,1980
4. History of Sabin attenuated poliovirus oral live vaccine strains;Sabin;J. Biol. Stand.,1973
5. 33rd Report;WHO Expert Committee on Biological Standardization,1983