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Helsingin raitiotiekartta .jpeg Helsingin raitiotiekartta Helsingfors sprvgskarta Helsinki Helsinki Helsingin raitiotie ja omnibus osakeyhti Institution National Library of Finland fi NBN fife cczero Mittakaava laskettu janamittakaavasta Liite Helsingin raitiotielinjat help warp yes Old maps of Helsinki Historical Aleksanterinkatu