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A NUMERICAL FACTOR FOR THE TAXONOMIC SEPARATION OF PTEROSTICHUS PENSYLVANICUS AND P. ADSTRICTUS (COLEOPTERA: CARABIDAE)
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- Journal:
- The Canadian Entomologist / Volume 101 / Issue 12 / December 1969
- Published online by Cambridge University Press:
- 31 May 2012, pp. 1315-1319
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- Article
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