http://www.academickids.com/encyclopedia/index.php/Henry_Ford
Encyclopedia page about Henry Ford.

http://inventors.about.com/library/weekly/aacarsassemblya.htm
The History of the Automobile.
The First Mass Producers of Cars – The Assembly Line.

http://www.cbc.ca/kids/general/the-lab/history-of-invention/default.html
A fascinating history of inventions – including the assembly line.