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- Geological Survey (U.S.)34
- Geological Survey of Alabama3
- Hampton, E. R.2
- Maryland Geological Survey2
- Anna, Lawrence O.1
- Cyprus. Tmēma Geōlogikēs Episkopēsēs.1
- Geological Survey (U.S.). Water Resources Division1
- Harrison, F.1
- Healy, Henry G.1
- Hershey, H. Garland (Howard Garland), 1905-1
- Hughes, G. H. (Gilbert H.)1
- Kanivetsky, Roman1
- Kentucky Geological Survey1
- Minnesota Geological Survey1
- National Atlas & Thematic Mapping Organisation (India)1
- Price, Don, 1929-1
- Serviços Geológicos de Portugal1
