Kirk-Othmer Encyclopedia of Chemical Technology, Helium Group to Hypnotics (Volume 13)

The fourth edition of this reference series is completely revised and includes many new subjects reflecting the growth and changes in chemical technology through the 1990s. It consists of 27 volumes which are issued at the rate of approximately four volumes per year. In addition to updating traditional subjects, the new edition includes expanded coverage of biotechnology, materials science, computer technology, energy sources and conversion techniques, and environmental issues such as pollution control, toxicology and recycling technology.