TY  - BOOK
AU  - Opler,Paul A.
AU  - Krizek,George O
TI  - Butterflies east of the Great Plains: an illustrated natural history 
PY  - 1984///
CY  - Baltimore
PB  - Johns Hopkins University Press
KW  - Butterflies
KW  - United States
KW  - Insects
N1  - Includes bibliographies and index
ER  -