TY  - BOOK
AU  - Darwin,Charles
TI  - The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their Habits
AV  - QH 
PY  - 2000///
PB  - Project Gutenberg
KW  - Soils
KW  - Earthworms
KW  - Humification
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/2355
ER  -