Libdex has a country index . National Library Catalogues Worldwide is maintained at the University of Queensland. For European National Libraries, consider Gabriel as a way to find and search the websites of a list of European National Libraries . Lastly, for more library links visit this NLA page . This retrieves a list of all relevant libraries.
Further notes provide address, webpage and phone numbers to specific libraries.
The National Library of Australia Catalogue is online. Search their full catalogue here or their periodical catalogue here . L ibrary Compound Resources Specialty Libraries are a brilliant resource for two reasons. Firstly, many of the unique resources reside here but secondly the specialty librarians are experts in resources for their area. Some libraries do not invite public access but will be almost universally open to you if you smile.