http://www.ck12.org Chapter 1. Introduction to Chemistry
1.3 References
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Domain - Joseph Wright. http://commons.wikimedia.org/wiki/File:JosephWright-Alchemist.jpg. Public Domain
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lic Domain - Courtesy of the US Department of Energy. http://commons.wikimedia.org/wiki/File:Soybeanbus.jpg. Public
Domain - Nuno Nogueira (User:Nmnogueira/Wikimedia Commons). http://commons.wikimedia.org/wiki/File:Hip_p
rosthesis.jpg. Public Domain - Gwydion M. Williams. http://www.flickr.com/photos/45909111@N00/3874573695/. CC BY 2.0
- Leonardo da Vinci (image on left photographed by Luc Viatour). (”left’’) http://commons.wikimedia.org/wiki
/File:Da_Vinci_Vitruve_Luc_Viatour.jpg; (”right”) http://commons.wikimedia.org/wiki/File:Studies_ofthe-
Arm_showing_the_Movements_made_by_the_Biceps.jpg. Public Domain - Joy Sheng. CK-12 Foundation. CC BY-NC 3.0
- ThinkGeoEnergy. http://www.flickr.com/photos/thinkgeoenergy/8073508665/. CC BY 2.0