TY  - BOOK
AU  - Tilden, James W.
AU  - Smith, Arthur Clayton.
TI  - A field guide to western butterflies
T2  - The Peterson field guide series
U1  - 595.789 
PY  - 1986///
CY  - Boston, Mass.
PB  - Houghton Mifflin
KW  - Mariposas
N1  - 59-210
ER  -