Patents relating to mechanization of timber harvesting / by S.E. Johnson and J. Richenhaller.
Wedi'i Gadw mewn:
| Rhifyn: | 4th ed. |
|---|---|
| Cyhoeddwyd: |
Ottawa :
Canadian Forestry Service,
1978.
|
| Prif Awdur: | |
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Disgrifiad Corfforoll: | 144 p. |
|---|---|
| Nodiadau: | Bib#: 502209 |
| Iaith: | English |
| Bib#: | 502209 |
