Copyright Review Management System renewals by year, data from Table 2 of the article "How Large is the ‘Public Domain’? A comparative Analysis of Ringer’s 1961 Copyright Renewal Study and HathiTrust CRMS Data."
|Date made available||2016|
|Publisher||University of Illinois at Urbana-Champaign|
Wilkin, J. P. (Creator). (2016): CRMS Renewals by Year, University of Illinois at Urbana-Champaign.