Umbral Cientifico  [electronic resource]. 

 - Bogotá : :  Universidad Manuela Beltrán 
<br/><br/> Title from content provider. 
<br/><br/><br/>Mode of access: World Wide Web. 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Revistas electronicas.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic journals.