Intellectual freedom manual 
compiled by the Office for Intellectual Freedom of the American Library Association. 
 - 4th ed. 
 - Chicago, Ill.  American Library Association  1992 
 - 283 p. ; 23 cm. 
<br/><br/><label>ISBN: </label>0838934129 
<br/><br/><label>LCCN: </label>92-10699 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Libraries--Censorship--United States--Handbooks, manuals, etc.<br/>Freedom of information--United States--Handbooks, manual, etc.