Blagden, John Do We Really Need Libraries : An Assessment of Approaches to the evaluation of the Performance of Libraries / by John Blagden - London: Clive Bingley, 1980. - 162p. ISBN: 0851573088 Subjects--Topical Terms: Library PerformanceLibrary ScienceManagementPerformance Assessment Dewey Class. No.: 021.0018 / BLA/D