London 1916 Duty, London 1919 The Path of Knowledge, London 1920 Nature-Spirits and the Spirits of the Elements, London 1920 Thomas Meyer: D. N. Dunlop, A Man of Our Time.
London 1916 Duty, London 1919 The Path of Knowledge, London 1920 Nature-Spirits and the Spirits of the Elements, London 1920 Thomas Meyer: D. N. Dunlop, ein Zeit- und Lebensbild.