Darwin, C., & Howard, A. S. (1966). Darwin on humus and the eartworm: The formation of vegetable mould through the action of worms with observations on their habits. London: Faber and Faber.
Παραπομπή Chicago StyleDarwin, Charles, and Albert Sir Howard. Darwin On Humus and the Eartworm: The Formation of Vegetable Mould Through the Action of Worms With Observations On Their Habits. London: Faber and Faber, 1966.
Παραπομπή MLADarwin, Charles, and Albert Sir Howard. Darwin On Humus and the Eartworm: The Formation of Vegetable Mould Through the Action of Worms With Observations On Their Habits. London: Faber and Faber, 1966.
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