Subject collections  a guide to special book collections and subject emphases as reported by university, college, public, and special libraries and museums in the United States and Canada 
compiled by Lee Ash 
 - 4th ed. revised & enlarged 
 - New York  R.R. Bowker  1974 
 - 908 p. ;  30 cm. 
<br/><br/><label>ISBN: </label>0835204359 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Libraries resources--United States--Directories