Columbia subject headings:
Coal mines and mining--Handbooks, manuals, etc.
Reclamation of land--Handbooks, manuals, etc.
Strip mining--Handbooks, manuals, etc.
Harvard subject headings:
Princeton subject headings:
Coal mines and mining--Handbooks, manuals, etc.
Reclamation of land--Handbooks, manuals, etc.
Strip mining--Handbooks, manuals, etc.