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  1. pdfNLM Annual Report of Programs and Services, 1989 
    https://www.nlm.nih.gov/.../nlmarchives/annualreport/1989.pdf
    ... JF, Beck JR, Lyon HC, Hirai FT. Anemia reference manual. Hanover, NH: Dartmouth ... 04487). Pao ML, Worthen DB. Retrieval effectiveness by semantic and ...
  2. pdfNLM Annual Report of Programs and Services, 1993 
    https://www.nlm.nih.gov/.../nlmarchives/annualreport/1993.pdf
    ... Jul;68(7):528- 32. (G08 LM 5329). Pao ML. Perusing the literature via citation links. Comput ... Res. 1993:26:143-56. (R01 LM 4177). Pao ML. Term and citation retrieval: a field study. ...