The New Encyclopædia Britannica: L-ZEncyclopædia Britannica, 1992 - 32 pages |
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Page 176
... Yangtze Valley . By the 8th century the lower Yangtze was export- ing enormous quantities of grain into the old Northwest by way of a unified system of canals linking the large rivers . By about AD 1100 the population of South China had ...
... Yangtze Valley . By the 8th century the lower Yangtze was export- ing enormous quantities of grain into the old Northwest by way of a unified system of canals linking the large rivers . By about AD 1100 the population of South China had ...
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20th century Abelian group addition aesthetic Afghanistan agriculture Albania alcohol algae algebra animals basin called central centre ceremonial climate coast common complex numbers Congo contains Côte d'Ivoire countries crops cultivation culture dance defined desert developed drinking drug East eastern economic Egypt elements equations European example farm feet field Figure finite fish forest functor Igbo important Indians integers irrigation isomorphism Kabul Kenya Lake Lake Chad Lake Victoria land language lattice Lie algebra linear major mapping miles modern mountains Niger Nigeria Nile northern operations patterns percent period Plains plants Plateau polynomial population rainfall real numbers region ring ritual River Sahara savanna social soil South Africa southern Africa species subgroup Sudan Tanzania theory tion traditional tribes tropical United valley vector space vegetation village West Africa western x₁ Yoruba Zaire Zambia Zimbabwe