Columbia subject headings:
Abortion--Religious aspects--Catholic Church--Papal documents.
Catholic Church--Doctrines--Papal documents.
Christian ethics.
Euthanasia--Religious aspects--Catholic Church--Papal documents.
Life and death, Power over--Religious aspects--Catholic Church--Papal documents.
Harvard subject headings:
Life--Religious aspects--Christianity
Right to life.
Princeton subject headings:
Abortion--Religious aspects--Christianity.
Capital punishment--Religious aspects--Christianity.
Catholic Church--Doctrines.
Euthanasia--Religious aspects--Christianity.
Life--Religious aspects--Christianity.
Medical ethics.
Right to life.