The Hermitage : Guide / Introd. by B. Piotrovsky ; Texts by B. Asvarishch, A. V. Bank et al. - Leningrad : Aurora, 1981. - 294 p. : ill. ; 21 cm. - 069.5:7(47+571)(084) (NLA) . Subjects--Corporate Names: Hermitage Museum (Russia) Universal Decimal Class. No.: 069.5:7(47+571)(084) (NLA)