History 99 Land tenure 86 Architecture 58 Arquitectura 56 urban and land use planning 50 Planificación urbana y uso de las tierras 36 Land reform 32 more ... Tenencia de la tierra 32 Land use 31 History and criticism 28 Politics and government 28 Law and legislation 27 Historia 24 Social conditions 20 Criticism and interpretation 16 Economic conditions 16 Education 15 Educación 14 Planificación urbana y de uso de las tierras 14 Indians of South America 13 Philosophy 13 Reforma agraria 13 Social aspects 12 Urbanization 12 Filosofía 10 Mexican Americans 10 Agriculture 9 Crítica e interpretación 9 Government relations 9 Land use, Urban 9 less ...