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1.
The Formation of Vegetable Mould Through the Action of Worms : With Observations on Their Habits [recurso electrónico] / Charles Darwin

by Darwin, Charles, 1809-1882.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2000Online access: Click here to access online Availability: No items available :

2.
The Farm That Won't Wear Out [recurso electrónico] / Cyril G. Hopkins

by Hopkins, Cyril G. (Cyril George), 1866-1919.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2003Online access: Click here to access online Availability: No items available :

3.
The Story of the Soil; from the Basis of Absolute Science and Real Life, [recurso electrónico] / Cyril G. Hopkins

by Hopkins, Cyril G. (Cyril George), 1866-1919.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2003Online access: Click here to access online Availability: No items available :

4.
Lessons on Soil [recurso electrónico] / Edward J., Russell

by Russell, Edward J., Sir (Edward John), 1872-1965.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2007Online access: Click here to access online Availability: No items available :

5.
Crops and Methods for Soil Improvement [recurso electrónico] / Alva Agee

by Agee, Alva, 1858-1943.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2007Online access: Click here to access online Availability: No items available :

6.
Right Use of Lime in Soil Improvement [recurso electrónico] / Alva Agee

by Agee, Alva, 1858-1943.

Material type: Continuing resource Continuing resource; Format: electronic Publisher: Project Gutenberg, 2008Online access: Click here to access online Availability: No items available :

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