1878. Modern area represented: Helsinki, Finland; Scale =1:100,000; Captured map. Генеральный штаб РККА.
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1977. Gyldén, Claes Wilhelm, 1802-1872, Helsinki (Finland : Urban commune). Kaupunkimittausosasto., Liewendahl, F., and Tengström, Fredrik, 1799-1871. Cartographic Details: Scale approximately 1:8,500. Facsimile. Relief shown by hachures. Cadastral map. Includes indexes and inset of Helsinki regio... Stadsmätningsavdelningen (Helsingfors).