Oxbridge directory of newsletters. 

 - New York  Oxbridge Communications  1979- 
 - v.  23 cm. 
<br/><br/> "The most comprehensive guide to U.S. and Canadian newsletters available." 
<br/><br/><label>ISSN: </label>0163-7010 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Newsletters--Directories.--United States<br/>Newsletters--Directories.--Canada
<br/><br/><label>LC Class. No.: </label>Z 6944  / .N44 S82