ACKNOWLEDGEMENT

I especially like to thank Bill Harlan who spent the summer with us and made some major contributions to these lectures. He strongly influenced chapter 7 section 2 and provided the example there. He suggested a splitting up of my conjugate-gradients-for-beginners program that makes it much easier to build upon. He wrote section 5 of chapter 7 on statics corrections, and he wrote section 6 of chapter 8 on wavelet corrections in the near surface.