Varnum, K. J. (2016). Exploring discovery: The front door to your library's licensed and digitized content. Facet Publishing.
Chicago-viite (17. p.)Varnum, Kenneth J. Exploring Discovery: The Front Door to Your Library's Licensed and Digitized Content. London: Facet Publishing, 2016.
MLA-viite (9. p.)Varnum, Kenneth J. Exploring Discovery: The Front Door to Your Library's Licensed and Digitized Content. Facet Publishing, 2016.
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