CK-12-Chemistry Intermediate

20.4. References http://www.ck12.org

20.4 References

1. Laura Guerin. CK-12 Foundation. CC BY-NC 3.0


2. User:Thaddeaus/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:Scottish_bonfire.jpg. Pub-
   lic Domain


3. User:Baruchlanda/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:SodaStream_Pure.jpg.
   Public Domain


4. Flickr:Choose_Freewill. http://www.flickr.com/photos/choose_freewill/359669938/. CC BY 2.0


5. User:GreenGlass1972/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:Lime_Kiln_Ogden_C
   anyon_Utah.jpg. Public Domain