 | Vacuum Freeze-Drying, a Method Used to Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines (UNESCO, 1987) |
 |  | 8. Early experiments in freeze-drying books and documents |
|
|
|
|
| Vacuum Freeze-Drying, a Method Used to Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines (UNESCO, 1987) |
| | 8. Early experiments in freeze-drying books and documents |
|
|
|
|
|