Vasilii Ruban, Kratkaia letopis Malyia Rossii 1506 po 1776 god. St Petersburg: Kh. F. Khlen, 1777. (sig. π1r)
Houghton Library, *RC7.R8212.777k (public domain)
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Vasilii Ruban, Kratkaia letopis Malyia Rossii 1506 po 1776 god. St Petersburg: Kh. F. Khlen, 1777. (sig. π1r)
Houghton Library, *RC7.R8212.777k (public domain)