Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Krol, A., and W. Zabecki. 1976. Szkodniki wtorne i techniczne drzewostanow jodlowych w Ojcowskim Parku Narodowym [Secondary and technical pests of silver fir stands in the Ojcow National Park] . Sylwan 120:1-10.
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