History 162 Land tenure 86 Architecture 60 Arquitectura 59 urban and land use planning 50 Philosophy 39 Politics and government 39 more ... Planificación urbana y uso de las tierras 36 History and criticism 33 Land reform 32 Tenencia de la tierra 32 Land use 31 Criticism and interpretation 29 Historia 25 Law and legislation 24 Filosofía 22 Social conditions 20 Economic conditions 18 Social aspects 17 General 16 Education 15 Ciencias sociales 14 Planificación urbana y de uso de las tierras 14 Political science 14 Psychoanalysis 14 Indians of South America 13 Reforma agraria 13 Urbanization 12 Law 11 Religion 11 less ...