- Hintze, Lehi F.1
- Indonesia. Direktorat Geologi1
- International Travel Maps (Firm)1
- Iowa Geological Survey1
- Isachsen, Yngvar W., 1920-1
- Isomi, Hiroshi1
- Laffitte, Pierre1
- Larson, Roger L. (Roger Lee), 1943- compiler1
- Lee, Wallace, 1883-19721
- Lee, Willis Thomas, 1864-19261
- Leonov, I︠U︡riĭ Georgievich1
- Love, J. D. (John David), 1913-20021
- Magyar Állami Földtani Intézet1
- Makhon ha-geʾologi (Israel)1
- Martin, G. C. (George Curtis), 1875-19431
- Martin, Helen M. (Helen Mandeville), 1889-19731
- Meents, Wayne Franklin1
- Miller, Benjamin L. (Benjamin LeRoy), 1874-19441
- Miller, James A. (James Anderson), 1939-1
- Missouri. Division of Geological Survey and Water Resources1
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