Records include correspondence, manuscripts, memoranda, documents and printed materials. The correspondence is mainly about the operation and projects of COCOSEERS. The manuscripts include a number of research reports on projects conducted by COCOSEERS. There are memoranda concerning the operation of COCOSEERS. The documents consist chiefly of financial records: bank statements, vouchers and receipts. The printed material includes bulletins and published reports on Slavic Library resources, as well as catalogs of publishers.