Semiclassical Mechanics, Which Stems From The Old Quantum Theory, Has Seen A Remarkable Revival In Recent Years As A Physically Intuitive And Computationally Accurate Scheme For The Interpretation Of Modern Experiments. The Main Text Concentrates Less On The Mathematical Foundations Than On The Global Influence Of The Classical Phase Space Structures On The Quantum Mechanical Observables. Further Mathematical Detail Is Contained In The Appendices. Worked Problem Sets Are Included As An Aid To The Student. Mark S. Child. Previous Edition: 1991. Includes Bibliographical References And Index. Mode Of Access: World Wide Web.