Columbia subject headings:
Children's writings, Mexican--Mexico--Yucatán (State)
Mayas--Mexico--Yucatán (State)--Folklore.
Pixies--Folklore.
Harvard subject headings:
Children's writings, Mexican--Mexico--Yucatán (State)
Mayas--Mexico--Yucatán (State)--Folklore.
Pixies--Folklore.
Princeton subject headings: