Referendex : a manual of architectural specifications and construction information, catalogue announcements of manufacturers and dealers in building supplies.
A 1914 trade manual issued by the Referendex Company of architectural specifications, construction data, and manufacturers' catalogue pages, compiled for architects, builders, and specification writers sourcing American building supplies. Halftone photographs and cutaway renderings show rolled steel sections, sliding fire doors on track hardware, window frames, and iron stair railings, often with inset detail circles, giving designers industrial hardware forms, sectional diagrams, and grey-toned catalogue plates.
