Wskaźniki funkcjonalności i statystyka biblioteczna - normy międzynarodowe, krajowe i sprawozdawczość GUS

[Performance indicators and library statistics - international and national standards, CSO reporting] The paper presents the international standards ISO 11 620 (Information and Documentation - Library performance indicators) and ISO 2789 (Information and Documentation - International library statistics). It discusses the objectives, content, planned changes and equivalent national standards. The paper also presents the problems of the new CSO forms for libraries and the national projects on library performance measurement in relation to these standards