Sweden, Norway, Denmark and Iceland in the world war. Sweden /
Carnegie Endowment for International Peace.Division of Economics and History.
Heckscher, Eli F.
Bergendal, Kurt.
Keilhau, Wilhelm.
Cohn, Einar.
Thornsteinsson, Thornsteinn.
Vedel-Petersen, K.
New Haven, Conn. & London,
1930.