Columbia subject headings:
Harvard subject headings:
Air signs (Astrology)--History--17th century.
Astrology, German--History.
Comets--Religious aspects--History--17th century.
Thirty Years' War, 1618-1648--Forecasting.
Princeton subject headings:
Comets--1618.
Comets--Religious aspects--History--17th century.
Comets--Social aspects--History--17th century.
Religion and science--Europe--History--17th century.
Thirty Years' War, 1618-1648.