Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers
Front Matter
Front Matter, Iowa Geological Survey, Volume XXIX, Annual Reports, 1919 and 1920, with Accompanying Papers
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • a-h
Article
Annual Report of the Director
George F. Kay
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • i-xx
Mineral Production in Iowa in 1919 and 1920
James H. Lees
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • xxi-xlviii
Petroleum and Natural Gas in Iowa
Jesse V. Howell
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • 1-48
The Origin and History of Extinct Lake Calvin
Walter H. Schoewe
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • 49-222
The Missouri Series of the Pennsylvanian System in Southwestern Iowa
John L. Tilton
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • 223-314
New Echinoderms from the Maquoketa Beds of Fayette County, Iowa
Arthur Ware Slocom and August F. Foerste
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • 315-384
Echinoderms of the Iowa Devonian
A. O. Thomas
1921-01-01 Volume 29 • 1921 • Annual Reports, 1919 and 1920, with Accompanying Papers • 385-552