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Integrated Catalogs

Here are some of the most helpful and widely used integrated library catalogs from across the region. They are useful for verifying bibliographic and publication information, as well as for finding holding information, which is used for Interlibrary Loan requests.

Blue and white flower pattern              Blue and white flower pattern


Probably the most well-known integrated catalog, WorldCat allows you to search hundreds of library catalogs in the U.S., Canada and other parts of the world, and request items through InterLibrary Loan (ILL). There are 1.5 billion items available through 10,000 libraries worldwide. You can search for books, CDs and videos- along with journals and many other items. Individual institutions that own the item searched are displayed in the item’s record, along with bibliographic information for a more complete citation.

Karlsruhe Virtual Catalog

This German-run integrated catalog searches libraries across Europe and all of the libraries within Germany. The bottom half of the search page lists many different catalogs from Germany, Austria, Switzerland and around the world. Check the box next to each catalog you want to search. On the bottom of the search page you will find some useful tips when conducting searches. NOTE: The Germans use a different transliteration system than our Library of Congress transliteration system. Please see this table for information; ALA is Library of Congress, DIN is the German transliteration and ISO is what much of the rest of Europe uses.

The European Library

The European Library provides access to the collections of libraries across Europe- included are the 48 National Libraries and leading research libraries of Europe. There are more than 100 million bibliographic records in the catalog. The single search box allows for easy searching although the results may be tricky to navigate. When looking at your search results, you will see three tabs: everything, full text and remote search. The remote search tab will lead you to a list of national libraries on the right hand side of the screen. Clicking on each name will show the holdings of that particular library.

French Union Catalog

For scholars of the region, it is not surprising that the French have a large collection of resources regarding Russia and Eastern Europe. The French Union Catalog boasts of more than 30 million documents and includes a variety of different catalogs- National Library of France, SUDOC, French regional catalogs, the catalog of Judaica, and several others. “Recherche globale” on the left-hand side allows you to search all of this catalogs.

Hungarian Union Catalog MOKKA

About 30 libraries in Hungary participate in this union catalog and provide nearly 2.9 million records from across the country. The search page is simple, with a search box as well as a tag cloud underneath, which might lead you to do some browsing. Locations are listed under the item’s record information and each location’s home page is available by clicking the image that looks like a house.


COBISS provides access to national, local and university libraries of most of the former Yugoslav republics and Bulgaria. Kosovo and Albania are preparing to participate in the COBISS system while an open invitation has been offered to libraries in Croatia but who are not participating now. Over 600 libraries are represented by this union catalog. Each country has its own search interface, although the design is the same across the board and quite easy to use.

Czech Union Catalog SKCR

The electronic version of this union catalog began in 1995 and now contains about 4.9 million records held in libraries and other public institutions of the Czech Republic. 139 institutions participate and contribute information from their catalogs to this integrated catalog. When conducting a search, the item’s record will include a link to the “local record” which will take you to the holding institution’s website. For more information about the union catalog, click on the “what is the union catalogue of the CR?” link on the search page.


Nearly all of Poland’s intellectual production since 2002 is included in this union catalog: books, periodicals, audio, musical scores, maps and other documents; many items from before 2002 are included as well. As of 2011, there are more than 2 million records on NUKAT from 127 different libraries across Poland and NUKAT continues to grow. You have the ability to conduct a quick search by phrase or a keyword search for titles, authors or subject. Holding information is available within the item’s record.

Kyrgyz Union Catalog

The Kyrgyz Union Catalog is available through the National Library of the Kyrgyz Republic’s website- you have the option of searching books and periodical holdings. About 15 libraries across the country participate and contribute records to this integrated catalog.