The health-sciences information struggle: the private information industry versus the National Library of Medicine.
D004465:Economic Competition / Q000331:legislation & jurisprudence*; D004467:Economics / Q000331:legislation & jurisprudence*; D049672:History, 19th Century; D049673:History, 20th Century; D007255:Information Services; D007883:Legislation, Medical; D008523:MEDLARS / Q000191:economics*; D009317:National Library of Medicine (U.S.) / Q000266:history; D014481:United States