Provedení Principles of book classification (1950)

HULME, Edward Wyndham. Principles of book classification. Reprinted from the Library Association Record ... London: Association of Assistant Librarians, 1950. 25 s. Association of Assistant Librarians. Reprints, no. 1. Fotofaksimile. Digitalizováno: Ann Arbor (Mich.): University Microfilms, 1977.