Columbia subject headings:
Francis, of Assisi, Saint, 1182-1226.
Nature--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500.
Nature.
Harvard subject headings:
Francis, of Assisi, Saint, 1182-1226--Views on nature.
Nature--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500.
Princeton subject headings:
Francis, of Assisi, Saint, 1182-1226.
Nature--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500.