blogdendj.blogspot.com

http://centrodeindustria.blogspot.com/2019/02/inscripcion-para-representantes-de.html

http://servicios.corferias.com/153/2019/preregistro.cfm

https://corferias.com/index.cfm?doc=calendario_ferial&ids=4&intAno=2019&IndFerial=S

https://securityfaircolombia.com/documentos/LABORATORIO-INTERNACIONAL-DE-SEGURIDAD.pdf

1.  ¿Qué es un ISP? 1.r/= 

https://www-sciencedirect-com.bdigital.sena.edu.co/science/article/pii/S0167739X17306088