edited by Academy of Sciences of the German Democratic Republic Central Institute for Physics of the Earth and Karl-Marx-University Leipzig, Department of Physics, Collm Geophysical ObservatoryAcademy of Sciences of the German Democratic Republic Central Institute for Physics of the Earth1978-
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Author HeadingKarl-Marx-Universität Leipzig. Geophysikalisches Observatorium Collm Zentralinstitut für Physik de...