- Geological Survey (U.S.) (17)
- Stose, George Willis, 1869-1960 (3)
- A. Hoen & Co (2)
- Bayley, William Shirley, 1861-1943 (2)
- Bebb, E. C (2)
- Michigan. Geological Survey (2)
- Chamberlin, Thomas C. (Thomas Chrowder), 1843-1928 (1)
- Clements, J. Morgan (Julius Morgan), 1869- (1)
- Cleveland-Cliffs Iron Company (1)
- Fairchild, D. L (1)
- Fowler, A. T (1)
- Hotchkiss, William Otis, 1878-1954 (1)
- Irving, Roland Duer, 1847-1888 (1)
- Oklahoma Geological Survey (1)
- Oliver Iron Mining Company (1)
- Pussey, Lewis B (1)
- Renshawe, John H (1)
- Seaman, A. E. (Arthur Edmond), 1858-1937 (1)
- Taylor, Frank B. (Frank Bursley), 1860-1938 (1)
