Heller, R. C., R. C. Aldrich, W. F. Bailey, and E. P. Merkel. 1955. Status of Ips pine engraver beetle epidemic in southern Georgia, an aerial detection and damage appraisal survey. United States Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, Forest Insect Survey, Report 7 (unpublished).
Heller et al. 1955
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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