Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Francke, W., V. Heeman, B. Gerken, J. A. A. Renwick, and J. P. Vite. 1977. 2-Ethyl-1, 6-dixaspiro (44) nonane, principal aggregation pheromone of Pityogenes chalcographus (L) . Naturwissenschaften 64:590-591.
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