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A taxonomic revision of the New World moth genus Pero (Lepidoptera: Geometridae).
By Robert W. Poole
USDA Technical Bulletin 1698: 1-257, 1987
Cite: 614615 with citation markup [cite:614615]
Poole, R. W. 1987. A taxonomic revision of the New World moth genus Pero (Lepidoptera: Geometridae). USDA Technical Bulletin 1698: 1-257 (PDF)