Kent, Allen.
Encyclopedia of Library and Information Science Vol-4 / - First Ed. / - New York-10016 : Marcel Dekker, Inc.. - p.707 :
4-0-8247-2004-0
2K / K8.4
Encyclopedia of Library and Information Science Vol-4 / - First Ed. / - New York-10016 : Marcel Dekker, Inc.. - p.707 :
4-0-8247-2004-0
2K / K8.4