Iowa Geological Survey. Technical paper
Includes two articles: Chemical and Thermal Values of Iowa Coals by H.L. Olin, R.C. Kinne and N.H. Hale and Description of Mines Sampled by James H. Lees.
Journal Article Version
Version of Record
Published Article/Book Citation
Analyses of Iowa Coals. (Iowa Geologic Survey Technical Paper, no. 1). Des Moines, Iowa: State of Iowa, 1929.
Material in the public domain. No restrictions on use.