4Denise Davis. Electronic Access And Use Related Measures :Summary of Findings. September 8, 2000. http://www.nclis.gov/statsurv/2000ven.pdf.
5Charle R. Mc Clure,John C. Bertot. Developing National Data Collection Models for Public Library Network Statistics and Performance Measures( funded by IMLS). http://www.ii.fsu.edu/getProjectDetail.cfm? pageID = 9&ProjectID = 8.