1 Subjects: “...rare-earth elements...”

2 Subjects: “...rare earth elements...”

3 Subjects: “...rare earth elements...”

4 Subjects: “...rare-earth elements...”

5 Subjects: “...heavy Rare Earth Elements (hREE)...”

6 Subjects: “...rare earth element REE...”

7 Subjects: “...rare earth elements...”

8 Subjects: “...rare earth elements (REE)...”