Han Dynasty Agricultural Inventions
HackneyedScribe. "Han Dynasty Agriculture" <http://www.historum.com/asian-history/37903-han-dynasty-agriculture.html>, 2012
History Alive! Learn TCI Textbook
Frey, Wendy "History Alive! The Ancient World" [No URL] 2011
Pictures
Hays, Jeffrey "Traditional Chinese Agriculture" <factsanddetials.com/china.php?item=9#>,2008.
Ten Ancient Chinese Inventions
H, Steven "10 Great Ancient Chinese Inventions" <http://listverse.com/2009/04/18/10-great-ancient-chinese-inventions/> 2009.
More Inventions
Institute of the History and Natural Sciences, "Carriages and Pumps" <http://www.paradeofthebuddhas.org/?page_id=38>, 2012.