Ice, ships and winter navigation : symposium in Oulu University 1977, 12, 16-17 in connection with the 100 year celebration of Finnish winter navigation
Ice, ships and winter navigation : symposium in Oulu University 1977, 12, 16-17 in connection with the 100 year celebration of Finnish winter navigation
Ice, ships and winter navigation : symposium in Oulu University 1977, 12, 16-17 in connection with the 100 year celebration of Finnish winter navigation
Ice, ships and winter navigation : symposium in Oulu University 1977, 12, 16-17 in connection with the 100 year celebration of Finnish winter navigation