163 B
163 B
[Source](https://static1.squarespace.com/static/50f14d35e4b0d70ab5fc4f24/t/53ef1dbae4b0a6d424125a6f/1408179642248/GDC 2009 sirlin handout6.pdf "Permalink to ")
[Source](https://static1.squarespace.com/static/50f14d35e4b0d70ab5fc4f24/t/53ef1dbae4b0a6d424125a6f/1408179642248/GDC 2009 sirlin handout6.pdf "Permalink to ")