Maps for Research Inventory list
| Identifier   | Title | Level of description | Date | Digital object | |
|---|---|---|---|---|---|
| 29 | Air photographs. | File | [19--] | ||
| 31 | Grand River watershed. | File | [19--] | ||
| 32 | Great Britain. | File | 1953 | ||
| 33 | Trinidad. | File | 1944 | ||
| 30 | Australia and Tasmania. | File | [196-]-1979 | 
