--subject headings beginning with the word Tropical; and subdivisions Tropics and Tropical conditions under subjects, e.g. Agriculture--Tropics; House painting--Tropical conditions
Here are entered works on densely populated, usually deteriorating, central areas of large cities, inhabited predominantly by poor people, often of a specific ethnic group, and on the social and economic problems of these areas.
--subject headings beginning with the word Tropical; and subdivisions Tropics and Tropical conditions under subjects, e.g. Agriculture--Tropics; House painting--Tropical conditions
--subdivision Tomography under individual diseases and types of diseases and individual organs and regions of the body, e.g. Cancer--Tomography; Heart--Tomography