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Brès, P. L. J ,  Koch, M ,  World Health Organization. Biologicals Unit ,  WHO Expert Committee on Biological Standardization (1984 : Geneva, Switzerland) ,  [Production and testing of the WHO yellow fever virus primary seed lot 213-77 and reference batch 168-73 / by P. Brès and M. Koch]

Brès, P. L. J ,  Koch, M ,  World Health Organization. Biologicals Unit ,  WHO Expert Committee on Biological Standardization (1984 : Geneva, Switzerland) ,  [Production and testing of the WHO yellow fever virus primary seed lot 213-77 and reference batch 168-73 / by P. Brès and M. Koch]