Guidelines on studies of information users (pilot version) 

 - Paris :  UNESCO,  1981 
 - 1 v # (pag. vari) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>UNISIST--Estudio y enseñanza
<br/><br/><label>LC Class. No.: </label>Q223  / G84