1-3 of 3 Books
Collectors in St Petersburg
By Gosudarstvennyĭ Ėrmitazh (Russia)
Kn︠i︡azʹ Nikolaĭ Borisovich ︠I︡Usupov
By A. Butorov
Drugoĭ I︠U︡supov
By V. I. Ivanova