- Space, Underground
- Subsurface space
- Subterranean areas
- Subterranean sites
- Underground sites
- Underground space
Exact Matching Concepts from Other Schemes
- found: Les communes wallonnes et la conservation du patrimoine souterrain, 1996: p. 1 (milieu souterrain) p. 2 (sites souterrains) p. 21 (paysages souterrains)
- 2001-01-16: new
- 2001-02-15: revised
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