•  
  •  
 

Most Popular Papers *

PDF

Chemistry of Clays p. 319-346
J. B. Weems

PDF

History of Coal Mining In Iowa & Coal Statistics p. 521-597
James H. Lees and S. W. Beyer

PDF

Altitudes in Iowa p. 363-550
James H. Lees

PDF

Administrative Reports p. 1-14
Frank A. Wilder and T. E. Savage

PDF

Flora Northern Iowa Peat Bogs p. 735-778
L. H. Pammel

PDF

The Coal Deposits of Iowa p. 21-396
Henry Hinds

* Based on the average number of full-text downloads per day since the paper was posted.
» Updated as of 10/12/17.