Systems and Procedures Exchange Center. Washington. <br/><br/>
User surveys 

 - Washington :  The Center,  (198 ?) 
 - c.a 150 h. 
<br/><br/><label>LCCN: </label>57396 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bibliotecas--Evaluación.
<br/><br/><label>Dewey Class. No.: </label>021  / C45