Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej. Studia i Materiały > 2006 > Vol. 117, nr 32 > 257-266
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journal ISSN : | 0370-0798 |
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[1] http://www.theheritagelrail.co.uk/carly%20ages/grimes%20graves.htm, stan na dzień 20.03.2006.
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[2] MCPHERSON M.J., Subsurface Ventilation and Environmental Engineering, 1992.
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[3] http://pl.wikipedia.org/wiki/Pliniusz_Starszy, stan na dzień 20.03.2006.