Thumbs up facebook like button next to number 1.
Originally uploaded in Cutting Edge:Develop Program-Wide Abilities:Undergraduate Research.

Image 31456 is a 330 by 516 pixel PNG
Uploaded: Nov1 11

Last Modified: 2011-11-01 12:23:14
Permanent URL: https://serc.carleton.edu/download/images/31456/facebook.png

The file is referred to in 2 pages
Original uploader was Dry Martini at it.wikipedia
Url: http://commons.wikimedia.org/wiki/File:Facebook-like-button.png
Permission line says CC-BY-SA-3.0