H. Hultberg

Influence of management practices in catchments on freshwater acidification: afforestation in the United Kingdom and North America
Harriman, R., Gene E. Likens, H. Hultberg, and C. Neal. 1994. “Influence of Management Practices in Catchments on Freshwater Acidification: Afforestation in the United Kingdom and North America”. In C. E. W. Steinberg and R. F. Wright (eds.). Acidification of Freshwater Ecosystems: Implications for the Future, 83-101. J. Wiley and Sons, Inc., New York.
Sulphur deposition to forested catchments in northern Europe and North America-large-scale variations and long-term dynamics
Hultberg, H., and Gene E. Likens. 1992. “Sulphur Deposition to Forested Catchments in Northern Europe and North America-Large-Scale Variations and Long-Term Dynamics”. In S. E. Schwartz and W. G. N. Slinn (coordinators). Precipitation Scavenging and Atmosphere-Surface Exchange. Vol. 3-The Summers Volume: Applications and Appraisals, 1343-65. Hemisphere Publishing Corporation.