Mudge, Isadore Gilbert. <br/><br/>
Reference work and reference books 

<br/><br/> Sobretiro de: Winchel, C.M. Guide to reference books. 8 ed. Chicago: ALA, 1967. pp. XIII-XVIII 
<br/><br/><label>LCCN: </label>41095 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Obras de consulta.<br/>Servicio de consulta (Bibliotecas)