Heritage Stones Subcommission. Terms of Reference as agreed by IUGS (2017)
HERITAGE STONE SUBCOMMISSION Terms of Reference. Final 2019 (still needs full approval by IUGS EC)
Heritage Stones Subcommission. Terms of Reference as agreed by IUGS (2017)
HERITAGE STONE SUBCOMMISSION Terms of Reference. Final 2019 (still needs full approval by IUGS EC)