Smith, R. H., R. L. Peloquin, and P. C. Passof. 1969. Local and regional variation in the monoterpenes of ponderosa pine wood oleoresin. United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, Research Paper PSW-56. 10 p.
Smith et al. 1969
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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