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Most recent data available: 2018/19
Update frequency: Annually
Next update: TBD


Volumes in Library as defined by ARL (Association of Research Libraries) as a single physical unit of any printed, typewritten, handwritten, mimeographed, or processed work which is typically the unit used to charge circulation transactions.

A comparison of the U15 Institutions and Tri-University Group (TUG) - TUG is a centralized library system that provides access to the library holdings of three local institutions (University of Waterloo, University of Guelph, and Wilfrid Laurier University)

Data Sources

  • Data source for U15 library holdings: Association of Research Libraries (ARL)
  • Tri-University Group totals from PowerPlay reports

Inclusions and Exclusions

Inclusions: Includes monographs, serial bound volumes, government documents, e-book units and electronic theses.

Exclusions: electronic serials, microforms, maps, non-print materials, and uncatalogued items.


2011/12 - No holdings reported for the University of Alberta.

Prior to 2012/13, the source for the holdings data was the Canadian Association of Research Libraries (CARL).  Starting in 2013/14, the data source changed to the Association of Research Libraries (ARL).

The 2012/13 number for Laval was revised to 5,315,812 as per the 2013/14 ARL report.

2014/15, 2015/16, 2016/17, and 2018/19 - No holdings reported for the University of Montréal.

Data Table