Johnson, G., Hauer, R. 2000. A Practitioner's Guide to Stem Girdling Roots of Trees: Impacts on Trees, Symptomology, and Prevention. University of Minnesota Extension Bulletn BU-7501-S.
20 pages. Color photos. Glossary. This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.
USDA Forest Service, Northeastern Area, State and Private Forestry; College of Natural Resources, University of Minnesota; Minnesota Department of Agriculture; University of Minnesota Extension Service.
Johnson, Gary R.; Hauer, Richard J..
A Practitioner's Guide to Stem Girdling Roots of Trees.
St. Paul, MN: University of Minnesota Extension Service.
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