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	1.	The spontaneous combustion of coal, with special reference to bituminous coals of the Illinois type, by S.W. Parr and F.W. Kressman ... by Parr, Samuel Wilson, 1857-1931 Kressman, Frederick William [joint author.] Series: Bulletin University of Illinois. Engineering Experiment Station ; no. 46 ... Material type: Text; Format: print ; Literary form: Not fiction Publication details: Urbana, Ill., The University [1910] Availability: No items available. Add to cart (remove)
	2.	Purchase and sale of Illinois coal on specification, by S. W. Parr. Work in cooperation with Illinois coal mining investigations, and University of Illinois. by Parr, Samuel Wilson, 1857-1931 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Urbana, Illinois state geological survey, University of Illinois, 1914 Availability: No items available. Add to cart (remove)

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