its my advice to all new aspirants not to confuse yourself in search of notes.
Just select one good book relevant to subject covering the whole syllabi and then make clear concepts based on these facts.
Make sure your own views based notes are best one . Stop copying others ,if you are firm and have grasp on the topic then its unique and best one .
I hope you will undestand .
Css is not only expression of material and knowledge but it demands your own views and knowledg to score .