Heller, R. C., R. C. Aldrich, W. F. McCambridge, and F. P. Weber. 1967. The use of multispectral sensing techniques to detect ponderosa pine trees under stress from insects or pathogenic organisms. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experimental Station, Annual Progress Report. 65 p.
Heller et al. 1967
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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