The Czech National Bibliography: new steps to completeness

The contents of the Czech National Bibliography (CNB) changed more times during more than 90 years of its history. The first issues covered just printed monographs, the records were prepared according to older Czech cataloguing rules. Later it was possible to observe newly added (or withdrawn) types of documents, new cataloguing rules – they changed five times during the CNB history – or temporal efforts to provide a bibliography of component parts (articles from newspapers and journals). An intensive endeavour was exerted in the last years to complete the CNB, not only to find and catalogue publications the National Library of the Czech Republic did not receive as a legal deposit, but also to fill gaps in regulations of legal deposit or to complete elements of bibliographic description that were found essential for availability of resources.