Performance Measures for Online Systems Authors John Ulmschneider Patrick Mullin . DOI: https://doi.org/10.3776/ncl.v48i3.2394 Downloads PDF Published 1990-01-01 Issue Vol 48, No 3 (1990) Section Research & Librarianship License Articles published 2023 and later: (C) The Authors, released under CC-BY license Articles published 2022 and earlier: Released under a CC-BY-NC license
