1. For an excellent introductory survey to fundamental concepts and techniques in Surface Physics, see Physics Today, April 1975.
2. For a broad in-depth review of both theoretical and experimental approaches to surface science studies, see Electronic Structure and Reactivity on Metal Surfaces, NATO Advanced Study Institute, Namur, Belgium, September 1975 (to be published by Plenum Press, NATO Advanced Study Institute Series).
3. Photoemission properties of metals