Darwin on humus and the earthworm

Soils of the eastern United States and their use--

Jay Allan Bonsteel

The formation of vegetable mould, through the action of worms

Charles Darwin

The formation of vegetable mould through the action of worms, with observations on their habits

Charles Darwin

The formation of vegetable mould

Charles Darwin

Structure and organic matter storage in agricultural soils

Martin R. Carter

Geotechnics of Organic Soils and Peat

Bujang B. K. Huat

Humic substances of soils and general theory of humification

D. S. Orlov

An agricultural testament

Howard, Albert Sir

Membrane-micelle model for humus in soils and sediments and its relation to humification

R. L. Wershaw

Humic Matter in Soil and the Environment

Kim H. Tan