Hall, J.L. Online bibliographic databases a directory and source book - 4ed - Aslib London 1986 - 509p,tables - Online Bibligraphicmdatabases Database Directory ISBN: 0 85142 202 2 = Hall, J.L. Standard No.: M Standard Tech. Report. No.: LCCN: B Nat. Bib. No.: 4902 Nat. Bib. Agency Control No.: 681.3 HAC Subjects--Topical Terms: Computer Science Universal Decimal Class. No.: 681.3