Columbia subject headings:
Harvard subject headings:
Henequen industry--Mexico--Yucatán (State)
Public health--Mexico--Yucatán (State)
Yucatán (Mexico : State)--Rural conditions.
Princeton subject headings:
Henequen industry--Mexico--Yucatán (State).
Occupational diseases--Mexico--Yucatán (State).
Peasants--Health and hygiene--Mexico--Yucatán (State).
Public health--Mexico--Yucatán (State).
Social classes--Mexico--Yucatán (State).
Work environment--Mexico--Yucatán (State).
Working class--Health and hygiene--Mexico--Yucatán (State).
Yucatán (Mexico : State)--Rural conditions.