An introduction to the nineteenth edition of the Dewey decimal classification / C.D. Batty. An introduction to the 19th edition of the Dewey decimal classification Batty, C. D. Dewey, Melvil, 1851-1931. Dewey decimal classification and relative index. Classification, Dewey decimal Programmed instruction. 025.4 BAI Includes indexes. London : C. Bingley, 1981. 1981. 1981 Text 168 p. ; eng