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water china economist ib_geog2009 Freshwater The water system Competing demands for water Management issues and strategies Drainage basins and flooding water_scarcity water_conflicts water_resources
ib_geog2009 gender switzerland
gender ib_geog2009 iray
ib_geog2009 population_change high_low_fertility spain pronatalist
ib_geog2009 libya migration refugees Populations in transition italy
IB AS population management contraception electrification