This is a textbook intended for graduate students who plan to work in nuclear magnetic resonance or electron spin resonance. The text describes the basic principles of magnetic resonance, steady-state and pulse methods, the theory of the width, shape and position of spectral absorption lines as well as the theory of relaxation times. It also introduces the density matrix. This third edition adds new material to many parts, plus new sections on one- and two-dimensional Fourier transform methods, multiple quantum coherence and magnetic resonance imaging.

This book constitutes the refereed proceedings of the 10th International Conference on Conceptual Structures, ICCS 2002, held in Borovets, Bulgaria. in July 2002.
The 27 revised full papers presented together with two invited contributions were carefully reviewed and selected for inclusion in the book. The papers are organized in topical sections on data and knowledge structures, information retrieval, natural language, ontology and semantics, interfaces and applications, and logical and mathematical foundations.

The first edition of this book was written in 1961 when I was Morris Loeb Lecturer in Physics at Harvard. In the preface I wrote: "The problem faced by a beginner today is enormous. If he attempts to read a current article, he often finds that the first paragraph refers to an earlier paper on which the whole article is based, and with which the author naturally assumes familiarity. That reference in turn is based on another, so the hapless student finds himself in a seemingly endless retreat. I have felt that graduate students or others beginning research in magnetic resonance needed a book...