James Duff Brown, Manual of Library Economy
“ There is no more important factor in the success or failure of a library than the classification of the books and other material which form its stock. Some of its uses are obvious to all readers; it brings the material on any subject together on the shelves and in the catalogues, and thus enables both librarian and reader to find books readily. It has perhaps more important uses, because it enables the librarian, and, in open access libraries, the public, to see the strength and weakness of the collection in various subjects ”
