Key to the rhopalocera (butterflies) of Wyoming
Ferris, C.D.
Key to the rhopalocera (butterflies) of Wyoming - Laramie 1971 - 1-61 p. - Whyoming Agriculture Experiment Station. Science Monograph No. 21 .
Key to the rhopalocera (butterflies) of Wyoming - Laramie 1971 - 1-61 p. - Whyoming Agriculture Experiment Station. Science Monograph No. 21 .