Update README.md

Author: DiarmuidM

README.md

@@ -16,6 +16,10 @@ _Data Analysis in Python_ - http://www.data-analysis-in-python.org/ <br />
 _Installation_ - Python 3 - https://www.python.org/downloads/   <br />
 _Sublime Text_ - https://www.sublimetext.com/3
 
-### Cheat Sheets (Python)
+### Useful resources
+
+https://www.dataschool.io/python-or-r-for-data-science/
+
+### Cheat Sheets
 
 https://ehmatthes.github.io/pcc/cheatsheets/README.html