GUIDE: University Microfilms International. Russian history and culture index : a microfiche collection of scarce books on 19th and early 20th century Russia from the Helsinki University Library. E-6273 This is a continuing set of microfiche of titles in the humanities and social sciences. The Helsinki University Library was an official depository of Russian books from 1820-1917. The individual titles are cataloged and appear in CRLCATALOG.