Biomedical research directory
Index Copernicus International S.A.
Yale University and Georgetown University. The archive of Lauinger Library.
Geneva Foundation for Medical Education and Research
(WHO Collaborating Centre in Education and Research in Human Reproduction)
The Directory of Open Access Journals
(Hosted and maintained by Lund University Libraries)
Embase Database Elsevier
(Embase is a Elsevier Product)
(Journal Access Directory Open Utility Network of Science)
Chemical Abstracts Service (CAS)
(A division of the American Chemical Society)
EBSCO Discovery Service USA
(EBSCO Information Services (USA & Canada)