Subclass TR
TR1-15 -- Dictionaries, Histories, etc.
TR150 -- Photographers' reference handbooks
TR179 -- Composition
TR183 -- Psychology, aesthetics, etc.
TR187 -- Photographic criticism
TR250-265 Cameras
TR287-500 Photographic processing. Darkroom technique
TR504-508 Transparencies. Diapositives
TR510-545 Color photography
TR550-581 Studio and laboratory
TR590-620 Lighting
TR624-835 Applied photography (including artistic, commercial, medical photography, photocopying processes)
TR845-899 Cinematography. Motion pictures
TR925-1050 Photomechanical processes