1. Worms and weathering;Atkinson;Antiquity,1957
2. Soils for the Archaeologist;Cornwall,1958
3. The Formation of Vegetable Mould through the Action of Worms;Darwin,1881
4. Grain losses in the field when windrowing and combining barley;Dodds;Canadian Agricultural Engineering,1974
5. Land Snails in Archaeology;Evans,1972