DOAJ-Directory of Open Access Journals
Biblioteca Virtual Miguel de Cervantes
http://www.cervantesvirtual.com
Puerto Rico Biblioteca Virtual en Salud
http://puerto-rico.homolog.bvsalud.org/php/index.php
BioMed Central
Chemistry Central
http://www.chemistrycentral.com
World Bank Group
Índice de Desarrollo Humano
HINARI (Research in Health)
http://extranet.who.int/hinari/es/journals.php
World Justice Project
http://worldjusticeproject.org
JURN
http://www.jurn.org/#gsc.tab=0
MedlinePlus
http://www.nlm.nih.gov/medlineplus/spanish/
Microsoft Academic Search
http://academic.research.microsoft.com
ProQuest Open
http://pqdtopen.proquest.com/search.html
Open DOAR- Directory of Open Access Repositories
http://www.opendoar.org/countrylist.php
World FactBook – Central Intelligence Agency (CIA)
https://www.cia.gov/library/publications/the-world-factbook/
Open Thesis
PubMed- US National Library of Medicine
http://www.ncbi.nlm.nih.gov/pubmed
PhysMath Central
http://www.physmathcentral.com
Plos
https://www.plos.org/publications/journals/
Redalyc – Red de Revistas Científicas
http://www.redalyc.org/coleccionHome.oa
SciELO
http://www.scielo.org/php/index.php
Tendencias PR
Instituto de Estadísticas
http://www.estadisticas.gobierno.pr/iepr/
The Doctors Channel- Video
http://www.thedoctorschannel.com
MedLine Plus
http://www.nlm.nih.gov/medlineplus/surgeryvideos.html
History Reposity for Health
http://libraria.rcm.upr.edu:8080/jspui/handle/2010/356
CONUCO