Title: Hartmann & Braun's electrical-instruments at the World's Columbian Exposition, Chicago
Subjects: Catalogs, Scientific apparatus and instruments industry, Scientific apparatus and instruments, Hartmann & Braun (Firm), World's Columbian Exposition (1893 : Chicago, Ill.), World's Columbian Exposition (1893 : Chicago, Ill.) (uri) http://id.loc.gov/authorities/names/n80008759 (uri) http://viaf.org/viaf/sourceID/LC|n80008759