Winifred Elsie Brenchley
Illinois State Geological Survey
John S. Hittell
John V. Meldrum
Edmund Deane
Walter Renton Ingalls
Homer Greene
George G. André
James Orton
Charles A. Bramble
John M. Good, Theodore E. White and Gilbert F. Stucker
Herbert Hoover
Thomas W. Knox
Josef Bersch
Georg Hartwig
Albert Frederick Calvert
Georgius Agricola (tr. Herbert & Lou Henry Hoover)