Curated OER
Unesco: Honduras: Maya Site of Copan
Discovered in 1570 by Diego Garcia de Palacio, the ruins of Copan, one of the most important sites of the Mayan civilization, were not excavated until the 19th century. The ruined citadel and imposing public squares reveal the three main...
Curated OER
Educational Technology Clearinghouse: Maps Etc: North China, 1971
" North China includes the densely populated and intensively cultivated North China Plain, the loess-covered uplands of Shansi, northern Shensi, and eastern Kansu, and the sparsely populated, semiarid steppes of Inner Mongolia....