Columbia subject headings:
Amphibians--Folklore.
Amphibians--Mythology.
Fertility, Human--Folklore.
Fertility, Human--Mythology.
Sex--Folklore.
Sex--Mythology.
Uterus--Folklore.
Uterus--Mythology.
Harvard subject headings:
Amphibians--Folklore.
Amphibians--Mythology.
Fertility, Human--Folklore.
Fertility, Human--Mythology.
Sex--Folklore
Sex--Mythology
Uterus--Folklore.
Uterus--Mythology.
Princeton subject headings: