Change History for theory

Version Date Author Comment
14 7 weeks tingke
13 7 weeks tingke
12 12 months tingke
11 19 months tingke
10 3 years tingke
9 3 years tingke
8 3 years tingke
7 3 years tingke
6 3 years tingke
5 3 years tingke
4 3 years tingke
3 3 years tingke
2 3 years tingke
1 6 years tingke