They provide answers to questions like who wrote what about G. V. Plekhanov and when, which of his works were published and when, which of the publications were issued in several subsequent editions, what was the range of his contacts and interests, etc. Special mention should be made of organizational and structural features of this information and reference system. For the first, there is no clear functional differentiation between Reader- and Staff's facilities. User-oriented information requirements involve both content and organization, as well as relevant auxiliary material, additional record formats, annotations etc. No qualitative analytical data or advisory annotations are involved.
Some cases combine alphabetical, classed and subject catalogues.
Enhanced retrieval is provided with relevant sub-headers within each tray. At present The Plekhanov House is developing an integrated data bank of machine-readable formats. In 4 vol. Public access in the Reading room. Compiled in 1961 - 1964.