DeBakey ME (1991). „The National Library of Medicine. Evolution of a premier information center”. JAMA266 (9): 1252–8. DOI:10.1001/jama.266.9.1252. PMID1870251.
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ncbi.nlm.nih.gov
DeBakey ME (1991). „The National Library of Medicine. Evolution of a premier information center”. JAMA266 (9): 1252–8. DOI:10.1001/jama.266.9.1252. PMID1870251.