Haeckel's theory of the unity of nature
Subtitle: a monograph in the history of philosophy
By: David H. Degrood.
Publisher: Christopher Publishing House
Published: 1965
Place of publication: Boston
Number of pages: 98
Subjects: Haeckel, Ernst Heinrich Philipp August, -- 1834-1919
Notes: Thesis (M.A.) - University of Buffalo.

Bibliography : p. 97-98.