Metaphysik der Natur

Revival: Ethical Principles in Theory and Practice (1930)

The History and Theory of Vitalism

Die Organischen Regulationen, Vorbereitungen Zu Einer Theorie des Lebens

The Science and Philosophy of the Organism, Volume 1

History and Theory of Vitalism 1914

The Science And Philosophy Of The Organism

History & Theory of Vitalism

Problem of Individuality; a Course of Four Lectures Delivered Before the University of London in October 1913

Science and Philosophy of the Organism; the Gifford Lectures Delivered Before the University Of

Revival