Land tenure 86 History 74 Architecture 57 Arquitectura 55 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 Law and legislation 23 Politics and government 20 Historia 18 Social conditions 16 History and criticism 14 Planificación urbana y de uso de las tierras 14 Psicología social 13 Reforma agraria 13 Social psychology 13 Clinical psychology 12 Indians of South America 12 Psicología clínica 12 Urbanization 12 Economic conditions 11 Mexican Americans 11 Criticism and interpretation 10 Government relations 9 Land use, Urban 9 Philosophy 9 Rural conditions 9 Agriculture 8 less ...