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The permeability and natural water saturation of coal seams : 5F, 1T, 6R. Soviet Min. Sci. V9, N4, July-Aug. 1973, P396–401

✍ Scribed by S.V. Kuznetsov; R.I. Krigman; V.I. Kostyukov

No coin nor oath required. For personal study only.

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