Maps of the history of retriangulation of Great Britain [peta]
26
| Format: | |
|---|---|
| Published: |
London : HMSO,
1967
|
| Subjects: |
| Summary: | 26 |
|---|
26
| Format: | |
|---|---|
| Published: |
London : HMSO,
1967
|
| Subjects: |
| Summary: | 26 |
|---|