Batty, C. D. An introduction to the nineteenth edition of the Dewey decimal classification / An introduction to the 19th edition of the Dewey decimal classification C.D. Batty. - London : C. Bingley, 1981. - 1 v. (various pagings) ; 23 cm. Includes indexes. ISBN: 0851573037 LCCN: 81201580 Subjects--Topical Terms: Classification, Dewey decimal--Programmed instruction. LC Class. No.: Z696.D7 / B37 1981 Dewey Class. No.: 025.4/31