More Ragtime

Assembly Line:

http://www.eyewitnesstohistory.com/ford.htm

http://www.history.com/this-day-in-history/fords-assembly-line-starts-rolling

http://www.pbs.org/wgbh/aso/databank/entries/dt13as.html

Industrial Revolution:

http://www.history.com/topics/industrial-revolution

http://scholar.google.com/scholar?hl=en&q=development+of+unions+during+the+industrial+revolution&btnG=&as_sdt=1%2C31&as_sdtp=