En
Ru| Title | Letter of I. Polyansky, teacher of chemistry, Peter Mikhailovich von Kaufman about his stay and summer pastime in the Caucasus and Yalta |
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| Series | Materials to the history of the KAUFMANS genus;Personal and official documents K.P., M.P., P.M.Kaufman |
| Fonds | Von Kaufman and von Kaufman Turkestan |
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