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mental hygiene
(Encyclopedia)mental hygiene, the science of promoting mental health and preventing mental illness through the application of psychiatry and psychology. A more commonly used term today is mental health. In 1908, th...National Radio Astronomy Observatory
(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...Wood Buffalo National Park
(Encyclopedia)Wood Buffalo National Park, 17,577 sq mi (45,525 sq km), in NE Alta., Canada, extending into the Northwest Territories; est. 1922 to protect the only remaining herd of wood bison. It lies between Lake...Canyon de Chelly National Monument
(Encyclopedia)Canyon de Chelly National Monument də shāˈ [key] [De Chelly, Sp. corruption of Navajo Tsegi = rock canyon], 83,840 acres (33,955 hectares), NE Ariz.; est. 1931. The area contains the ruins of sever...New River Gorge National River
(Encyclopedia)New River Gorge National River: see National Parks and Monuments (table)national parks and monuments (table). ...Nez Percé National Historical Park
(Encyclopedia)Nez Percé National Historical Park: see National Parks and Monuments (table)national parks and monuments (table). ...Nez Percé National Historic Trail
(Encyclopedia)Nez Percé National Historic Trail: see National Parks and Monuments (table)national parks and monuments (table). ...Ninety Six National Historic Site
(Encyclopedia)Ninety Six National Historic Site: see National Parks and Monuments (table)national parks and monuments (table). ...North Country National Scenic Trail
(Encyclopedia)North Country National Scenic Trail: see National Parks and Monuments (table)national parks and monuments (table). ...Ocmulgee Mounds National Historical Park
(Encyclopedia)Ocmulgee Mounds National Historical Park: see National Parks and Monuments (table)national parks and monuments (table). ...Browse by Subject
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