Image caption on page 124 of the book US National Library of Medicine: "Donald A.B. Lindberg, MD, Director of the library, speaks at a public program marking the anniversary and recognizes library staff - both past and present- for their public service. In the background is the library's official 175th anniversary logo featuring the timespan of its service, 1836 to 2011, and the message of 'Information Innovation.'"
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