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Sparks, D.L. 2006. Historical aspects of soil chemistry, p. 307-337, In Warkentin, B.P. Editor. 2006. Footprints In The Soil: People And Ideas In Soil History. Elsevier Ltd., Oxford UK
Sparks, D.L. 2006. Milestones In soil chemistry. Soil Sci. 171:S47-S50.
Readings below from Environmental Soil Chemistry, 2nd Edition (Academic Press, 2002, San Diego, CA) by D.L. Sparks. |