1. G. M. Smith and J. J. Coleman, Chapter 7 of the present volume.
2. J. C. Campbell, Chapter 8 of the present volume.
3. P. M. Asbeck, M. F. Chang, K. C. Wang, and G. J. Sullivan, Chapter 4 of the present volume.
4. C. A. King, Chapter 5 of the present volume.
5. A. F. J. Levi, Chapter 6 of the present volume.