Columbia subject headings:
Charcoal industry--Caribbean Area--History--Congresses.
Charcoal industry--Europe--History--Congresses.
Harvard subject headings:
Charcoal industry--Caribbean Area--History--Congresses.
Charcoal industry--Europe--History--Congresses.
Ethnology--Caribbean Area--Congresses.
Ethnology--Europe--Congresses
Princeton subject headings:
Charcoal industry--Caribbean area--History--Congresses.
Charcoal industry--Europe--History--Congresses.
Ethnology--Caribbean area--Congresses.
Ethnology--Europe--Congresses.