BROWN, James Duff. Subject classification, with tables, indexes, etc., for the subdivision of subjects. 2nd ed., revised. London: Grafton, 1914. 406 s.
ark:/13960/t4rj4p77j. Digitální kopie (2008, dle exempláře Kalifornské univerzity) dostupná z Internet Archive: http://archive.org/details/classific00browsubjectrich.
Ve: NK ČR (ABA001)