Slavi︠a︡nskīĭ i vostochnyĭ ornament po rukopisi︠a︡m drevni︠a︡go i novago vremeni (1887)
Stasov, V. V. (Vladimir Vasilʹevich), 1824-1906, Alexander II, Emperor of Russia, 1818-1881, Kartograficheskoe zavedenīe A. Ilʹina · Sanktpeterburg : Kartograficheskoe zavedenīe A.A. Ilʹina · leaf 263
Decoration and ornament
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.