Hall, J. L. <br/><br/>
Online bibliographic databases :  a directory and sourcebook / 
James L. Hall 
 - 4th ed 
 - London :  Aslib,  1986 
 - xv, 509 p. :  ill. ;  24 cm 
<br/><br/>Bibliography: p. [353]-441 
<br/><br/><label>ISBN: </label>0851422020 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine-readable bibliographic data -- Directories.<br/>Information storage and retrieval systems-- Directories.
<br/><br/><label>Dewey Class. No.: </label>025.04025  / HAO 1986