Diccionario of special libraries and information centers 

 - 5. ed 
 - Detroit, Mich.   : Gale Research  , 1979 
 - 1279p. 
 - Their Directory of special libraries and information centers .
<br/><br/><label>Subjects--Personal Names: </label><br/>Young, Margaret Labash<br/>Young, Harol Chester<br/>Lenroot-Ernt, Louis
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bibliotecas especializadas.<br/>Directorios.<br/>Servicios de información.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Estados Unidos.<br/>Canadá.