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.
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.