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Ion leaching in forest ecosystems along a Great Lakes air pollution gradient. Journal of Environmental Quality. 21(4):614-623.. 1992.
Environmental stress effects on vigor, mortality, and growth in northern hardwood forests along a pollution-climate gradient. The Michigan Academician. 30:27-47.. 1998.
Soil solution chemistry and ion leaching in northern hardwood forests across an 800 km pollution gradient. Emerging Issues in Northern Hardwood Management: Air Pollution, Climate Change & Biodiversity. Miscellaneous Publication 91-1:38.. 1991.
Invertebrate Biodiversity in Northern Hardwood Ecosystems under Varying Disturbance Regimes. Beech Bark Disease: Proceedings of the Beech Bark Disease Symposium. Gen. Tech. Rep. NE-331:88-91.. 2005.
Studying the effects of air pollution on forest along exposure gradients: experiences in the United States and opportunities for cooperation. Climate and Atmospheric Deposition Studies in Forests. :109-115.. 1994.
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Condition of hardwood forests in Michigan: 1991-1999. Technical Report 00-1. 2000.