The Bowker annual of library and book trade information. 

 - 18th ed. 
 - New York :    R.R. Bowker,    1973. 
 - viii, 548 p. ;    25 cm. 
<br/><br/>  Sponsored by the Council of National Library Associations. 
<br/><br/><label>ISBN: </label>0835205614 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Libraries -- Periodicals.-- U.S. <br/> Information science -- Periodicals<br/> Book industries and trade -- Periodicals.