Duke's Visual Studies librarian created the Guide to finding scholarly images, which also includes a discussion about Quality, Scholarly Images for Research, Publication; Scanning Recommendations and Copyright.
Музей Академии художеств (Museum of the Russian Academy of Arts)
Database of objects held by the Museum of the Russian Academy of Arts (including items not yet included in the Goskatalog)
British Museum: digital colleciton includes Russian prints, some drawings. Searching in Roman alphabet only, spelling varies.