Columbia subject headings:
Abandoned mined lands reclamation--Congresses.
Landscape ecology--Congresses.
Sustainable engineering--Congresses.
Harvard subject headings:
Abandoned mined lands reclamation--Congresses.
Abandoned mines--Environmental aspects--Congresses.
Landscape architecture--Congresses
Landscape design--Congresses.
Reclamation of land--Congresses
Princeton subject headings: