Dubin S., S. <br/><br/>
Professional obsolescence 

 - London :  English University,  1971 
 - 121 p.  : gráfs. 
<br/><br/><label>LCCN: </label>22234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Profesiones.
<br/><br/><label>Dewey Class. No.: </label>370  / D8