World's Columbian Exposition Chicago, Ill. (1893). Guide through the exhibition of the German chemical industry. J. Sittenfeld.
Chicago-viite (17. p.)World's Columbian Exposition Chicago, Ill. Guide Through the Exhibition of the German Chemical Industry. Berlin: J. Sittenfeld, 1893.
MLA-viite (8. p.)World's Columbian Exposition Chicago, Ill. Guide Through the Exhibition of the German Chemical Industry. J. Sittenfeld, 1893.
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