Title | Pirin AA "On volcanic activity in Kamchatka in the past and present" |
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Series | 1920-1930 |
Fonds | Ryabikov Pavel Fedorovich, general, professor of the General Staff Academy |
Display format |
Title | Pirin AA "On volcanic activity in Kamchatka in the past and present" |
---|---|
Series | 1920-1930 |
Fonds | Ryabikov Pavel Fedorovich, general, professor of the General Staff Academy |
Display format |