[The stability of increased virulence of vaccine strain E of Rickettsia prowazekii].

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@article{Balaeva1970TheSO, title={[The stability of increased virulence of vaccine strain E of Rickettsia prowazekii].}, author={N. M. Balaeva and V N Nikol'skaia}, journal={Zhurnal mikrobiologii, epidemiologii, i immunobiologii}, year={1970}, volume={47 8}, pages={36-8} }