Now showing items 34-53 of 101
| Subject |
|---|
| Eel River [12] |
| Erosion [12] |
| Fire clay [1] |
| Floyd County Indiana [4] |
| Fossils [37] |
| Glacial drift [17] |
| Harrison County Indiana [7] |
| Hematite [4] |
| Historical iron production methods [1] |
| Historic mineral values [2] |
| History of coal mining [6] |
| History of coal mining in Indiana [1] |
| History of natural gas usage [2] |
| Howard County Indiana [4] |
| Husbandry [1] |
| Hydrogen gas [2] |
| Insects [2] |
| Iron ore [14] |
| Iron production [3] |
| Iroquois River [2] |
Now showing items 34-53 of 101