Letter N. V. Muravyev from A. [A.] Porokhovshchikov, the inventor of fire-resistant dwelling - about the "fireproof" for schools...

Title Letter N. V. Muravyev from A. [A.] Porokhovshchikov, the inventor of fire-resistant dwelling - about the "fireproof" for schools and the preparing edition of the same letter for adults, as well as the meaning of its invention
Series 1789-1919
Fonds Muravyov
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