History 34 Land use 25 Economic conditions 24 Economic aspects 14 Agriculture 13 Cities and towns 12 Social conditions 9 more ... Economic history 8 Cadastres 7 Rural development 7 Land tenure 6 Land value taxation 6 Peasants 6 Economic policy 4 Government policy 4 Industries 4 Rural conditions 4 Salt industry and trade 4 Agricultural laborers 3 Population 3 Salt marshes 3 Taxation 3 Agriculture and state 2 Banks and banking 2 Birth control 2 City planning 2 Community development, Urban 2 Elite (Social sciences) 2 Intellectual life 2 Land reform 2 less ...