Rothstein, Samuel. <br/><br/>
The development of reference services ; throug academic traditions, public library practice and special librarianship 

 - Boston :  Gregg Press,  1972 
 - 124 p. 
 - ACRL Monographs  ; 14 .
 - ACRL Monographs  ; 14 .
<br/><br/><label>LCCN: </label>53266 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Servicios de consulta (bibliotecas)
<br/><br/><label>Dewey Class. No.: </label>025.52  / R6