Resources
"Inventions of the Renaissance." Book unit teacher Web. 28 May 2014. <http://www.bookunitsteacher.com/renaissance/inventions.htm>.
"Leonardo Da Vinci's Inventions" Leonardo Da Vinci's Inventions. WordPress, 2014. Web. 28 May 2014
<http://www.leonardodavincisinventions.com/>.
"Leonardo Da Vinci's Inventions" Leonardo Da Vinci's Inventions. WordPress, 2014. Web. 28 May 2014
<http://www.leonardodavincisinventions.com/>.