Struve, Henryk (1840–1912) Gins, Aleksander (c. 1819 – 1908)
Struve, Henryk (1840–1912) Michalski, Jan (1876–1950)
Księgarnia Józefa Ungra (Petersburg) Unger, Józef (1817–1874)
Wierzbicki, Stanisław (1847–1912) Unger, Józef (1817–1874)
Kunicki, Leon (1829–1873) Unger, Józef (1817–1874) Gustaw Sennewald