Citations
http://www.historydoctor.net/Advanced%20Placement%20World%20History/40.%20The_Industrial_revolution.htm
http://www.sewerhistory.org/grfx/components/pipe-jnts1.htm
http://prezi.com/wwm-farlohrr/industrial-revolution-sewerage-project/
http://www.english-online.at/art-architecture/skyscrapers/skyscrapers.htm
http://www.evolo.us/architecture/skyscrapers-reconfigure-lyons-urban-fabric/
http://www.google.com/search?hl=en&site=imghp&tbm=isch&source=hp&biw=1
http://www.youtube.com/watch?v=eutUTVpdWDc
http:// hikingartist.com/ehU-c3m
http://www.sewerhistory.org/grfx/components/pipe-jnts1.htm
http://prezi.com/wwm-farlohrr/industrial-revolution-sewerage-project/
http://www.english-online.at/art-architecture/skyscrapers/skyscrapers.htm
http://www.evolo.us/architecture/skyscrapers-reconfigure-lyons-urban-fabric/
http://www.google.com/search?hl=en&site=imghp&tbm=isch&source=hp&biw=1
http://www.youtube.com/watch?v=eutUTVpdWDc
http:// hikingartist.com/ehU-c3m