Encyclopedia of information systems and services / 
[by] Anthony T. Kruzas [and others]. 
 - 3rd ed. 
 - Detroit, MI :  Gale Research,  [1978] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information services -- United States -- Directories.--Information services -- United States -- Directories.--Information services -- United States -- Directories.<br/>Information storage and retrieval systems -- Directories.--Information storage and retrieval systems -- Directories.<br/>Data libraries -- United States -- Directories.--Data libraries -- United States -- Directories.--Data libraries -- United States -- Directories.