References

·    Duggal, S, K. (2008). Building Materials: Uses of Stones. (3rd ed.). New Age International: New Delhi.
     Lyons, A. (2010). Materials for Architects and Builders: Blocks and Blockwork. (4th ed.). Elsevier Ltd.: Hong Kong.

     How Stuff Works.  (n.d.). 5 Long-Lasting Building Materials. Retrieved 17 March, 2012, from http://home.howstuffworks.com

Encyclopedia Britannica. (n.d.). Building Construction. Retrieved 17 March, 2012, from http://www.britannica.com

Auburn Education. (n.d.) Historical Timeline of Concrete. Retrieved 17 March, 2012, from http://www.auburn.edu

Green Spec. (n.d.). Blocks: Concrete and its Alternatives. Retrieved 17 March, 2012, from http://www.greenspec.co.uk

Stone Info. (2002). Stone History and Fact Guide. Retrieved March 17, 2012, from http://www.natural-stone.com
Mariamilani. (n.d.). Building Materials in Ancient Rome. Retrieved March 17, 2012, from http://www.mariamilani.com
About Civil. (n.d.). Properties of Concrete. Retrieved March 16, 2012, from http://www.aboutcivil.com
Foundations Ambuja Knowledge Initiative. (n.d.). Environment Impact. Retrieved March 16, 2012, from http://www.foundationsakc.com
Science Jrank. (n.d.). Brick History. Retrieved on March 17, 2012, from http://science.jrank.org
The Brick Industry Association. (n.d.). Technical Notes on Brick Construction: Manufacturing of Brick. Retrieved on March 17, 2012, from | http://www.sgtk.ch
Austral Bricks. (n.d.). Benefits of Bricks. Retrieved on March 17, 2012, from http://www.australbricks.com
Omni Block. (n.d.).  Advantages of Omni Block. Retrieved on March 18, 2012, from http://www.omniblock.com/