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gbt1.png (source) and gbt2b.png (source) is a derivative of artwork courtesy of the National Radio Astronomy Observatory
alabbw17.png and alabbw17b.png is a derivative of artwork courtesy of the American Library Association. (9/25/2017)
howtospotfakenews.png and howtospotfakenews-thumb.png are derivatives of infographic by IFLA (http://www.ifla.org/copyright), used under the Creative Commons Attribution 4.0 International (CC BY 4.0) (2/9/2017)
"Holiday Library Hours" is a derivative of "Purple Christmas decorations" by christmasstockimages.com, used under CC BY 3.0.
(12/2/2015)
"Extended Hours" is a derivative of "Two college girls learning in the library", used under CC BY-SA 2.0 and "IMG_7637.jpg" by markgraf, used under morgueFile license (morgueFile free photo) (12/2/2015)