United States National Library of Medicine is a medical library in Bethesda, Maryland. It is operated by the United States Federal government. It is the largest medical library in the world.[1]
↑DeBakey ME (1991). "The National Library of Medicine. Evolution of a premier information center". JAMA. 266 (9): 1252–8. doi:10.1001/jama.266.9.1252. PMID1870251.