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Sponheuer, W. External Organizations;
Kunze, A. External Organizations;
Grünthal, G., Sponheuer, W., Kunze, A. (1983): Maps of epicentres and maximum observed intensities (of earthquakes) for the territory of the GDR. - In: Brouček, I. (Ed.), Proceedings of the meeting of the Working Group 4.3 KAPG: Commission of Academies of Sciences of Socialist Countries for Planetary Geophysical Research, Geophysical Institute of the Slovac Academy of Sciences, 33-40.