MIDCAT
    Search first in MIDCAT by subject and/or keyword.
    Sample subject headings for Russian and East European Studies:

    russia federation
    soviet union
    commonwealth of independent states
    former soviet republics
    europe eastern

    (individual country names)
    russian literature
    east european literature
    women russia
    art russia

    Make a list of useful subject headings to use in other library catalogs.
    Look for bibliographies by searching in keyword, e.g., czechoslovakia and bibliography.
If you need more books and can wait for Interlibrary Loan (2 weeks or so), try:
WorldCat If you need to identify materials in other libraries (to order via Interlibrary Loan), use this union catalog of over 40 million books, documents, report and media. Dissertation Abstracts For an extensive project or thesis, use this catalog of PhD dissertations and masters' theses published from 1851 to current.
Libweb: Library Servers via WWW