Drawing on the NLM's library of oral history transcripts and video interviews specifically focused on Health Services Research (HSR), this combines narrative with interviews to document the evolution of HSR into the recognized and significant field of study that it is today. The video starts with HSR's beginnings in 17th century England, quickly moving through interviews with key leaders in the field to highlight the central health care and health services research questions with which it continues to wrestle today: What works? Under what circumstances? For which conditions? At what cost? The health services researchers interviewed in the video (in order of their initial appearance) are: Kerr White, Dorothy Rice, Charles Flagle, Mitch Greenlick, Morris Collen, Edward Hinman, Norman Weissman, audio of Sam Shapiro, Karen Davis, Joseph Newhouse, Kathleen Lohr, Judith Lave, Gordon DeFriese, John Wennberg, Paul Cleary, and Marsha Lillie-Blanton. The 48-minute video is captioned and accompanied by a full transcript (pdf). Additional HSR-related archival materials and oral histories can be found in the National Information Center for Health Services Research Oral Histories collection , Archives and Modern Manuscripts Oral Histories, as well as in the general collections and holdings of NLM.