Most recent affiliation: HathiTrust Research Center, iSchool, University of Illinois, Champaign, IL USA
Most recent affiliation: HathiTrust Research Center, iSchool, University of Illinois Urbana-Champaign, USA
Most recent affiliation: HathiTrust Research Center, United States of America
Most recent affiliation: Indiana University, United States of America
Most recent affiliation: HathiTrust Research Center, Pervasive Technology Institute / Luddy School of Informatics, Computing, and Engineering, Indiana University, Bloomington, IN USA
Most recent affiliation: HathiTrust Research Center, iSchool, University of Illinois Urbana-Champaign, USA