PubMed (U.S. National Library of Medicine)

נושאים: 
Medicine, Biomedical literature, Life sciences, Nursing, Dentistry, Veterinary Medicine, Health Care System
Type: 
Full - Text
Coverage: 
1949 - current
Categories: 
Chemistry
Categories: 
English Linguistics
Categories: 
Life Sciences
Categories: 
Medicine
Note: 

Free resource that is developed and maintained by the National Center for Biotechnology Information (NCBI) comprises approximately 20 million citations.