1. Use of Library Materials: The University of Pittsburgh Study, Books in Library and Information Science, V. 26, One significant early study was Allen Kent and University of Pittsburgh, (New York: Marcel Dekker, 1979).
2. My cursory examination did not control for factors such as the acquisition date of the book, hence the appellation “crude.”,
3. Library Resources & Technical Services, Dan Hazen, “Lost in the Cloud: Research Library Collections and Community in the Digital Age,” 55, no. 4 (October 2011): 200.