Spartak Chochov

Department of Geology and Paleontology, Sofia University, 1000 Sofia
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Laboratory of Physicogeological reserach, Institute of Oceanology, Russian Academy of Sciences, 117218 Moscow
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Laboratory of Geomagnetism, Institute of Earth's Physics, Russian Academy of Sciences, 121810 Moscow
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Laboratory of Geomagnetism, Institute of Earth's Physics, Russian Academy of Sciences, 121810 Moscow

Volume 23 6 December 1993

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Volume 16 6 December 1986