TY  - BOOK
AU  - Field, William D.
AU  - Herrera, José.
TI  - The pierid butterflies of the genera Hypsochila Ureta, Phulia Herrich-Schaffer Infraphulia Field, Pierphulia Field and Piercolias Staudinger
T2  - Smithsonian contributions to zoology
PY  - 1977///
CY  - Washimgton
PB  - Smithsonian Institution
KW  - Mariposas
KW  - Pieridae
ER  -