Directory of government document collections and librarians. 

 - Washington, D. C.    Congressional Information Service. 
 - v. ;    23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Government publications -- Library resources -- Directories .-- U. S. <br/> Document librarians -- Directories.-- U. S.