Reference

 

 

       1-     http://www.gardenofpraise.com/ibdpast.htm

 2-    http://www.zephyrus.co.uk/louispasteur.html

3- http://www.bbc.co.uk/history/historic_figures/pasteur_louis.shtml

4- http://www.lookandlearn.com/blog/5336/louis-pasteurs-method-of-killing-harmful-bacteria/