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Instruction on the Observation of the Displacement of Rocks, the Earth's Surface and Undermined Structures at Coal and Shale Deposits
stresses
gen.
Инструкция по наблюдению за сдвижением горных пород, земной поверхности и за подрабатываемыми сооружениями на угольных и сланцевых месторождениях
(E&Y
ABelonogov
)
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