1286
Darwin, Charles Robert.
Darwin on humus and the earthworm;the formation of vegetable mould through the action of worms with observations on their habits
London
Faber and Faber
1945
153p.:ill
First published in 1881 under title:The formation of vegetable mould through the action of worms
by Charles Darwin, with an introd by Sir Albert Howard
، Earthworms
، Humus
، Soil fertility
QL
391
.
D3
1945
AU
TI
CL
