An excellent source for brief entries on a wide range of biological topics. Includes metabolic pathways, molecular structures, conformations. Five volume set with extensive essays on topics dealing with ethics and values in the life sciences and health fields. An excellent nine volume source of information on human biology, ranging from genetics and cell biology to public health. A good source for biological diagrams and illustrations designed to be copied.
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An excellent multi-volume set which covers every field of modern science and technology. Supplemental volumes are published each year. A simple on-line encyclopedia, with a strong emphasis on cell biology and molecular biology. Many links to other sites. An excellent biological dictionary.