Collected papers to commemorate the 60th anniversary of the Sodankylä Observatory - Sucksdorff, C., 1928-; Keränen, Jaakko, 1883-1979; Dieminger, W.; Gupta, J. C.; Kataja, E.; Keränen, J.; Koivumaa, S.; Sodankylä Geophysical Observatory (Finnish Academy of Science and Letters, 1973)