PL151186B1 - The method of protection of chambers,especially those historical ones,in salt mines against progressive rock mass deformations
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The method of protection of chambers,especially those historical ones,in salt mines against progressive rock mass deformations
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PL26028086A1986-06-261986-06-26The method of protection of chambers,especially those historical ones,in salt mines against progressive rock mass deformations
PL151186B1
(en)