| Additional Metadata | |
|---|---|
| , | |
| Grondboor & Hamer | |
| CC BY 3.0 NL ("Naamsvermelding") | |
| Organisation | Nederlandse Geologische Vereniging |
|
W.F. Anderson. (1966). Grommelstenen. Grondboor & Hamer, 20(4), 186–188. |
|
| Additional Metadata | |
|---|---|
| , | |
| Grondboor & Hamer | |
| CC BY 3.0 NL ("Naamsvermelding") | |
| Organisation | Nederlandse Geologische Vereniging |
|
W.F. Anderson. (1966). Grommelstenen. Grondboor & Hamer, 20(4), 186–188. |
|