Lawrence Berkeley National Laboratory
Berkeley Lab: Charge, Parity, and Time Reversal (Cpt) Symmetry
A simple explanation of the development of three principles of symmetry: parity, time reversal invariance, and charge conjugation.
Nobel Media AB
The Nobel Prize: Chen Ning Yang Biographical
Official Nobel biography of Chen Ning Yang. Emphases on where and when, and on his scientific publications. Little description of his actual scientific work here.