Stam, Alan Christie, Samuel B. McLaughlin, and J. F. McCormick. Effects of Acidic Precipitation on the Soil Chemistry and Bioavailability of Aluminum, Manganese, and Copper. Oak Ridge, TN: Oak Ridge National Laboratory, 1990.

Stam, Alan Christie. Effects of Acidic Precipitation on the Soil Chemistry and Bioavailability of Aluminum, Manganese, and Copper. Knoxville, TN: University of Tennessee, 1989.