~ssues. This volume is designed to document a variety of factors which are basic to the defining, selection, planning, implementation, and evaluation of substance use and misuse intervention. This book is not a traditional proceedings volume. Because the needs of a listening audience are quite different from those of the solitary reader, and the roles of a workshop or plenary session participant are also dissimilar from those of the reader, not all of the Congress presentations are included, and the articles that are included have undergone major revi­ sions. Current intervention needs and options demand a broad spectrum of clearly defined roles for all who are or should be involved. Hence these issues, among others, served as guidelines in the preparation of the revised articles.