The study was undertaken to examine the functions and organization of the British Museum Library, the National Central Library, the National Lending Library for Science and Technology, and the Science Museum Library in providing national library facilities; to consider whether in the interests of efficiency and economy such facilities should be brought into a unified framework; and to make recommendations. Library services in the context of the nations information system are reviewed in the second chapter. The present role of each of the national institutions dealing with such matters as administration, services, staffing and usage patterns is considered next. The present-day requirements for national library services and an estimate of future demands are examined in Part III. A summary of the main recommendations is given at the beginning of the report, and a complete list with relevant paragraph numbers at the end. The appendices include the results of the surveys carried out at the principal national libraries, together with material which deals with certain topics which are not fully covered in the main body of the report. (Author)