The Audubon Society field guide to North American butterflies /
Pyle, Robert Michael.
The Audubon Society field guide to North American butterflies / Robert Michael Pyle ; visual key by Carol Nehring and Jane Opper. - A Chanticleer Press ed. - New York : Knopf : Distributed by Random House, c1981. - 916 p. : ill. (some col.) ; 20 cm. - Audubon Society field guide series .
Includes indexes.
0394519140 (pbk.)
Butterflies--Identification.--North America
Insects--Identification.
Insects--Identification.--North America
QL548 / .P94 1981
595.78/9097
The Audubon Society field guide to North American butterflies / Robert Michael Pyle ; visual key by Carol Nehring and Jane Opper. - A Chanticleer Press ed. - New York : Knopf : Distributed by Random House, c1981. - 916 p. : ill. (some col.) ; 20 cm. - Audubon Society field guide series .
Includes indexes.
0394519140 (pbk.)
Butterflies--Identification.--North America
Insects--Identification.
Insects--Identification.--North America
QL548 / .P94 1981
595.78/9097