title: Ubiquitous but unfinished: online information retrieval systems.
authors.forename: William R
authors.initials: WR
authors.lastname: Hersh
mesh_terms: D016206:Databases, Bibliographic / Q000592:standards*; D017050:Episode of Care; D006801:Humans; D016239:MEDLINE; D009862:Online Systems / Q000592:standards*; D012106:Research; D018511:Systems Integration