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Red Book of the Tver Region. - Ed. 2 nd, revised. and additional. - Tver: Tver Printed Yard, 2016. -
605: Natural Wealth of Russia Letter of May 10, 2017 No. 6160-05 from the Ministry of Natural Resources and Ecology of the Tver region on the transfer of a disk with scans Kr. books.
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Source of the electronic copy: Ministry of Natural Resources and Ecology of the Tver Region |
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Ru
