مصادر الإنترنت المستعان بها:-

http://www.google.com\

http://vb.elbnat.net/t168.html 

http://www.6abib.com/a-627.htm 

http://www.edumedia-sciences.com/ar/a440-the-sense-of-smell

http://www.aadd2.com/vb/showthread.php?p=664151

http://www.aadd2.com/vb/showthread.php?p=664151

http://www.youtube.com/watch?v=aAXywE1Rpvg

http://knowingallah.com/V2/Document.aspx?lang=ar&id=741