Subjects
- Environmentalism[remove]8
- Maps.2
- Account books1
- Coal industry.1
- Coal mining - coal operators associations.1
- Coal mining.1
- Coal operators associations.1
- Conservation & Conservationists.1
- Diaries and journals.1
- Engineering1
- Jones-Hall Forest.1
- Lumber industry and timber.1
- Medicine1
- New Deal, 1933-19391
- Petroleum industry and trade1