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Tests on the influence of working protective seams on coal and gas outburst prevention in coal mines of the Ostrava-Karvina basin (in Polish) : Smid, M Przegl Gorn, V38, N6, June 1977, P255–261


Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
114 KB
Volume
15
Category
Article
ISSN
0148-9062

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