encyclopedias

A science encyclopedia designed for middle school students, examining topics related to physics, explaining what physics is, and covering motion and force, energy, electricity and magnetism, heat, waves, sound and light, nuclear energy, and people who study physics, with further reading sidebars and illustrations.

A science encyclopedia designed for middle school students, examining topics related to astronomy and space, explaining what astronomy is, and covering the solar system, stars, galaxies, the universe, space exploration, and people who study space, with further reading sidebars and illustrations.

Chronicles the history of the U.S. presidents, from Richard Nixon to Jimmy Carter, highlighting key events and accomplishments in each administration, and includes an introductory essay on America in the 1970s, profiles of the first ladies, a list of Cabinet members, and a time line.

Chronicles the history of the U.S. presidents, from Dwight Eisenhower to Lyndon Johnson, highlighting key events and accomplishments in each administration, and includes an introductory essay on America in the 1950s and 1960s, profiles of the first ladies, a list of Cabinet members, and a time line.

Presents alphabetized profiles of illegal drugs, legal addictive drugs and other substances, and commonly abused classes of over-the-counter and prescription drugs, covering their histories, effects on the body, typical users, treatment options, consequences of use, and legal issues; and includes illustrations, sidebars, and several reference tools. This volume covers "Marijuana"-"Nitrous Oxide.".

Volume eight of a nine-volume encyclopedia that presents profiles of 193 countries of the world, arranged alphabetically from Afghanistan to Zimbabwe. Each entry is divided into thirty-five standardized sections on topics like agriculture, education, and climate.

Volume nine of a nine-volume encyclopedia that presents profiles of 193 countries of the world, arranged alphabetically from Afghanistan to Zimbabwe. Each entry is divided into thirty-five standardized sections on topics like agriculture, education, and climate.

Volume six of a nine-volume encyclopedia that presents profiles of 193 countries of the world, arranged alphabetically from Afghanistan to Zimbabwe. Each entry is divided into thirty-five standardized sections on topics like agriculture, education, and climate.

Volume seven of a nine-volume encyclopedia that presents profiles of 193 countries of the world, arranged alphabetically from Afghanistan to Zimbabwe. Each entry is divided into thirty-five standardized sections on topics like agriculture, education, and climate.

Volume four of a nine-volume encyclopedia that presents profiles of 193 countries of the world, arranged alphabetically from Afghanistan to Zimbabwe. Each entry is divided into thirty-five standardized sections on topics like agriculture, education, and climate.