The weathering of coal
By: by S. W. Parr and N. D. Hamilton.
Contributors: Hamilton, Nain Delf,
Series: Bulletin no. 17. University of Illinois Engineering experiment station; University of Illinois bulletin -- v. 4, no. 33; Bulletin (University of Illinois (Urbana-Champaign campus). Engineering Experiment Station) -- no. 17
Publisher: The University
Published: 1907
Place of publication: Urbana, Ill
Subjects: Coal.