Online bibliographic databases : a directory and sourcebook / James L. Hall. Hall, J. L. (James Logan) Information storage and retrieval systems Directories. Online bibliographic searching Directories. Machine-readable bibliographic data Directories. 025.04025 HAO Includes indexes. Bibliography: p. 354-441. London : Aslib, c1986. c1986. 1986 Text xv, 509 p. : eng