Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Kraemer, G. D. 1950a. Die kritischen Grenzen des Brutbaumdisposition fur Borkenkafer befall an Fichte (Picea excelsa L.). Zeitschrift fur Angewandte Entomologie 31:463-512 [erroneous, not in place cited].