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Ru| Author | |
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| Description |
Ruma, Raul Nikolayevich (1855-1909).Materials for the sanitary description of the Perm province / [cit.] R. Rooma.Vol.1-.- Perm: Perm.lips.Zemstvo, 1885. - 25. -.Electronic Source: PB
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| Publisher | Перм. губ. земство |