Signed articles, arranged alphabetically by subject, intended as a practical tool for those responsible for the protection of the health of industrial workers throughout the world. Emphasizes preventive action. Contains approximately 200 new entries that reflect new knowledge or developments since the previous edition. Entries tend to be lengthy and give references. Some illustrations, cross references. Index of authors (with identifications and locations). Subject index. v. 1, A-K; v. 2, L-Z.