Oxford University Press and The National Association of Social Workers are proud to announce that a new, completely updated, revised and expanded 20th edition of this essential work is now available in paperback. The 400 articles in this 4-volume set covers all aspects of social, work from practice and interventions, social environments, social conditions and challenges, to social policy and history. This new edition of the Encylcopedia includes coverage of areas that have come to the fore since the 1995 publication of the 19th edition, including demographic changes from immigration, technology, the implications of managed care, faith-based assistance, evidence-based practice, gerontology, and trauma and disaster. Each thoughtful article is written and signed by a top academic or social work practitioner and includes a bibliography for further reading. For even further ease of use, all volumes are fully cross-referenced and includes a complete Index.