Brinkler Classification is the library classification system of Bartol Brinkler described in his article "The Geographical Approach to Materials in the Library of Congress Subject Headings". The geographical aspect of a subject may be conveyed through three types of headings labeled A, B, and C. Heading A uses a primary topical description with geographical subdivisions (e.g. Art—Paris). Type B uses a place-name for the main heading with a topical subdivision (e.g. Paris—Description). C headings use a geographical description of a phrase (e.g. Paris Literature).