Kelley, Grace Osgood The classification of books : an inquiry into its usefulness to the reader / Grace Osgood Kelley. - New.York. : Wilson , c1937 [Reprint 1938]. - 200 p. ; 23 cm. Includes index. Subjects--Topical Terms: Classification--Books. Dewey Class. No.: 025.81 / KEC 1938