@article{4307, author = "Sigl, Rudolf and XIVth General Assembly of IUGG 1967", title = "Comparasion in Space for Heights of Mean Sea Level, Determination of Secular Movements between Land and Sea./Activity of the Special Study Group No.22, Linked to Section II. of International Association of Geodesy 1963-1967/. ", year = "1967", note = "1 brož.", }