Nowak, G. J. (1998). Petrologic recognition of coal seams of the lower Ssilesian coal basin. Prace panstwowego instytutu geologicznego 162.
Chicago Style CitationNowak, Grzegorz J. "Petrologic Recognition of Coal Seams of the Lower Ssilesian Coal Basin." Prace Panstwowego Instytutu Geologicznego 162 1998.
MLA CitationNowak, Grzegorz J. "Petrologic Recognition of Coal Seams of the Lower Ssilesian Coal Basin." Prace Panstwowego Instytutu Geologicznego 162 1998.
Warning: These citations may not always be 100% accurate.