http://www.d3noob.org/2014/01/tree-diagrams-in-d3js_11.html
https://bl.ocks.org/mbostock/3750558
https://assets.datacamp.com/blog_assets/PandasPythonForDataScience.pdf
https://www.analyticsvidhya.com/blog/2015/07/11-steps-perform-data-analysis-pandas-python/
https://github.com/pandas-dev/pandas/blob/master/doc/cheatsheet/Pandas_Cheat_Sheet.pdf
https://www.surveymonkey.com/results/SM-XMFQX9JX/
https://www.surveymonkey.com/results/SM-XMFQX9JX/browse/
http://quantsoftware.gatech.edu/Midterm_Study_Guide
http://quantsoftware.gatech.edu/CS7646_Spring_2017
http://quantsoftware.gatech.edu/Midterm_Study_Guide_Legacy
http://quantsoftware.gatech.edu/images/d/d2/2016Spring-midterm.pdf
http://quantsoftware.gatech.edu/images/e/e7/2015-midterm.pdf
https://docs.google.com/document/d/16T79A2bvi90txWD14_i8ns2qHT20Ut7SJC-jjuZtYOQ/pub
https://docs.google.com/document/d/1sVHdIchHNMJro0CbxIBXexCwQ621MPMe-sCG3KTCdEo/pub
https://www.surveymonkey.com/results/SM-XMFQX9JX/browse/
https://github.com/pandas-dev/pandas/blob/master/doc/cheatsheet/Pandas_Cheat_Sheet.pdf
https://www.datacamp.com/community/tutorials/pandas-tutorial-dataframe-python#gs.bOxDZI0
https://s3.amazonaws.com/assets.datacamp.com/blog_assets/PandasPythonForDataScience+%281%29.pdf