Land tenure 86 History 83 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 Politics and government 25 Law and legislation 23 Historia 19 History and criticism 19 Social conditions 19 Economic conditions 15 Planificación urbana y de uso de las tierras 14 Psicología social 13 Reforma agraria 13 Social psychology 13 Clinical psychology 12 Criticism and interpretation 12 Indians of South America 12 Psicología clínica 12 Urbanization 12 Mexican Americans 11 Philosophy 10 Agriculture 9 Government relations 9 Land use, Urban 9 Rural conditions 9 less ...