Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
A Field Guide to Eastern Butterflies (Peterson Field Guides)
By Paul A. Opler, Vichai Malikul, Roger Tory Peterson
Houghton Mifflin Company, 1992
ISBN: 039563279X
Cite: 3033 with citation markup [cite:3033]