The  formation of vegetable mould, through the action of worms
Subtitle: with observations on their habits.
By: New York, D. Appleton, 1896.
Series: The Works of Charles Darwin,; v. 16
Publisher: AMS Press
Published: 1972
Place of publication: [New York
Language: eng
Number of pages: 326
Subjects: Earthworms.; Humification.