1. See Kepler trans. Aiton & Duncan (1981).
2. Alberti, H. J. von, Mass und Gewicht, Berlin, 1957.
3. Aristotle Meteorologica, trans. H. D. P. Lee, Heinemann (Loeb), 1962.
4. Aristotle On coming-to-be and passing away, trans. E. S. Forster, Heinemann (Loeb), 1965.
5. Aristotle Physics, trans. P. H. Wicksteed & F. M. Cornford, Heinemann (Loeb), 1970.