Lindbo, D. L., and J. Mannes, 2008, Soil!: Get the Inside Scoop, Soil Science Society of America, Madison, WI, 32 pp.
Lindbo, D. L., 2012, Know Soil, Know Life, Soil Science Society of America, Madison, WI, 206 pp.
Logan, W. B., 1995, Dirt: the Ecstatic Skin of the Earth, Riverhead Books, New York, 202 pp.
Soil Survey Staff, 2014, Keys to Soil Taxonomy, 12th edition, US Department of Agriculture, Natural Resources Conservation Service, Washington, DC, 362 pp.. [PDF]
Soil Survey Staff, 2014, Illustrated Guide To Soil Taxonomy, US Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, NE, 498 pp.. [PDF]