北米研究図書館協会（ARL）が、各種図書館統計（いずれも2007-2008年度）を公表しています。
ARL Publishes ARL Statistics 2007-2008
http://www.arl.org/news/pr/ARL-Statistics-7dec09.shtml
ARL Publishes ARL Academic Law Library Statistics 2007-2008
http://www.arl.org/news/pr/ARL-Law-Statistics-7dec09.shtml
ARL Publishes ARL Academic Health Sciences Library Statistics 2007-2008
http://www.arl.org/news/pr/ARL-HS-Statistics-7dec09.shtml
