Here is the whole collection of articles pertaining to the mental aspect of training from USA Swimming.
Chapter 1 Goal Setting
Chapter 2 Mental Imagery
Chapter 3 Self Talk
Chapter 5 Concentration
Chapter 6 Team Building & Team Cohesion
Chapter 6 Self-Confidence
Chapter 7 Physical and Mental Energy
Chapter 8 Mental Preparation
For some reason they list two chapter 6's and no chapter 4.