Columbia subject headings:
Birth control--Ontario--Toronto.
Contraceptives.
Family size--Ontario--Toronto.
Fertility, Human.
Harvard subject headings:
Birth control--Ontario--Toronto.
Contraceptives.
Family planning--Ontario--Toronto.
Family size--Ontario--Toronto.
Fertility, Human.
Princeton subject headings:
Birth control--Toronto.
Contraceptives.
Family size--Toronto.
Fertility, Human.