Subjects: AMERICANS; ETHNOLOGY; GEOGRAPHYUNITED States; NORTH America
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Subjects: ETHNOLOGY; GEOGRAPHYUNITED Kingdom; EUROPE; NORTHERN Europe
Subjects: POPULATION dynamics; LANGUAGE policyUNITED Kingdom
Subjects: ECONOMIC development; CULTUREUNITED States
Subjects: WATER-wheels; HYDRAULIC machinery; WATER powerSYRIA
Subjects: Curriculum Development; Educational Change; Educational HistoryCanada
Subjects: WATER-wheels; IRRIGATION; WATER powerEUROPE
