Columbia subject headings:
Harvard subject headings:
Coal mines and mining--Chile--Lota--Pictorial works.
Coal mines and mining--Chile--Lota.
Coal trade--Chile--Lota--Pictorial works.
Lota (Chile)--Pictorial works.
Princeton subject headings:
Coal mines and mining--Chile--Lota--Pictorial works.
Coal mines and mining--Chile--Lota.
Coal trade--Chile--Lota--Pictorial works.
Lota (Chile)--Pictorial works.