Columbia subject headings:
Photography, Stereoscopic--History--19th century.
Photography, Stereoscopic--History--20th century.
Harvard subject headings:
Photography, Stereoscopic--History--19th century.
Photography, Stereoscopic--History--20th century.
Three-dimensional imaging--History--19th century.
Three-dimensional imaging--History--20th century.
Princeton subject headings:
Photography, Stereoscopic--History--19th century.
Photography, Stereoscopic--History--20th century.