TY  - ART
TI  - Butterflies; their structure, changes and life-histories, with special reference to American forms. Being an application of the "Doctrine of descent" to the study of butterflies. With an appendix of practical instructions — Illustration, BHL page 19200159
PY  - 1881
UR  - https://www.biodiversitylibrary.org/page/19200159
ID  - page-19200159
ER  -