encyclopedias

Describes over five hundred animals and plants around the world that are threatened with extinction; arranged taxonomically by family and genus within the categories of mammals, birds, reptiles, amphibians, fish, molluscs, annelids, coelenterates, arachnids, crustaceans, insects, and plants.

Examines Austen's life, work, and her era, and includes a chronology of her life, her work, and of historical events.

An encyclopedia of science and technology, covering such areas as the Earth, the ocean, plants and animals, medicine, agriculture, manufacturing, and transportation.

Contains 123 essays that provide information about the major diseases and disorders of the human body, arranged alphabetically from abdominal disorders through epilepsy; and includes an alphabetical list of contents, and listings of entries by medical specialization and by system affected.

This two-volume supplement to the original six-volume core set incorporates the full spectrum of African American life and their hritage traced from their African roots to their American present.