Hall, J. L. (James Logan) <br/><br/>
On-line information retrieval sourcebook 
J. L. Hall 
 - London  Bowker-Saur  1977. 
 - xii, 267 pages. : illustration., forms, maps ; 24 cm. 
<br/><br/>Bibliography: p. 209-242. 
<br/><br/><label>ISBN: </label>0851421067 
<br/><br/><label>Subjects--Topical Terms: </label><br/>On--line bibliographic searching<br/>Data base searching<br/>Data bases--Directories