Darwin, Charles, 1809-1882
The Formation of Vegetable Mould Through the Action of Worms : With Observations on Their Habits [recurso electrónico] / Charles Darwin - Project Gutenberg, 2000 - Project Gutenberg 2355 .
Public domain in the USA.
Text
Humification Soils Earthworms
QH
The Formation of Vegetable Mould Through the Action of Worms : With Observations on Their Habits [recurso electrónico] / Charles Darwin - Project Gutenberg, 2000 - Project Gutenberg 2355 .
Public domain in the USA.
Text
Humification Soils Earthworms
QH