Petropavlovskai︠a︡ krepostʹ : Putevoditelʹ /
Bastareva, Li︠u︡dmila Ivanovna.
Sidorova, Valentina Ivanovna,active 1965-joint author
Leningrad : Lenizdat,
1980.
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Petropavlovskai︠a︡ krepostʹ (Leningrad, Russian S.F.S.R.)