[ThinkingPlus]

I think that the references are important in order to provide a positive and unambiguous connection between illustrative examples provided in forum posts and pertinent sections of the book. In this way greater understanding of the book can be obtained making it a more practical reference for everyday use rather than an arcane textbook of golf mechanics and geometry. Simply put, the references allow one to place the sticky note explanation (forum post) in the correct place in the book.