Bogart, Leo. <br/><br/>
Preserving the press :  how daily newspapers mobilized to keep their readers / 
Leo Bogart. 
 - New York :  Columbia University Press,  c1991. 
 - xvi, 327 p. [12] p. of plates :  ill. 
<br/><br/><label>ISBN: </label>0231072627 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Newspaper Readership Project.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Readership surveys--United States.<br/>American newspapers--Circulation--Research.<br/>Newspaper reading--Research.