[Map of Asia, showing the exploration routes of M.A. Castrén, G.A. Wallin, G.J. Ramstedt and C.G. Mannerheim]
Castrén, Matthias Alexander.
Mannerheim, Carl Gustaf Emil,1867-1951.
Ramstedt, Gustaf John.
Wallin, Georg August.
[Helsinki : Finnish Society of Sciences,
1971]
In: Oriental Studies in Finland, 1828-1918, by P. Aalto.