Institution: | 1. College of Information Studies and Institute for Advanced Computer Studies, University of Maryland, College Park, MD 20742, United States;2. School of Information Sciences, University of Pittsburgh, 135 North Bellefield Av, Pittsburgh, PA 15260, United States;3. Department of Library and Information Studies, University at Buffalo, State University of New York, 528 Baldy Hall, Buffalo, NY 14260, United States |