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Author
- Geological Survey (U.S.)10
- Detterman, J. S.9
- Hackman, Robert J.8
- Kent, Bion H. (Bion Huntley), 1925-4
- Sable, V. H.4
- Bates, C. E.3
- Bennett, H. S.2
- Miller, Calvin F.2
- Platt, J. N.2
- Reed, John Calvin, 1930-2
- Condon, W. H. (William H.)1
- MacCary, L. M. (Lawrence Mend), 1925-1
- Marshall, C. H.1
- Withington, C. F. (Charles Francis), 1920-1
