TY  - BOOK
AU  - Darwin , Charles 
TI  - The formation of vegetable mould: through the action of worms with observations on their habits
U1  - 592.64 21st ed.
PY  - 1904///
CY  - London
PB  - John Murray
KW  - Earthworms
KW  - Humus
N1  - Index: pp 289-98
ER  -